summaryrefslogtreecommitdiffstats
path: root/media/ffvpx/libavcodec/vp8.c
diff options
context:
space:
mode:
Diffstat (limited to 'media/ffvpx/libavcodec/vp8.c')
-rw-r--r--media/ffvpx/libavcodec/vp8.c2858
1 files changed, 2858 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/vp8.c b/media/ffvpx/libavcodec/vp8.c
new file mode 100644
index 000000000..c1c3eb707
--- /dev/null
+++ b/media/ffvpx/libavcodec/vp8.c
@@ -0,0 +1,2858 @@
+/*
+ * VP7/VP8 compatible video decoder
+ *
+ * Copyright (C) 2010 David Conrad
+ * Copyright (C) 2010 Ronald S. Bultje
+ * Copyright (C) 2010 Fiona Glaser
+ * Copyright (C) 2012 Daniel Kang
+ * Copyright (C) 2014 Peter Ross
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/imgutils.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "mathops.h"
+#include "rectangle.h"
+#include "thread.h"
+#include "vp8.h"
+#include "vp8data.h"
+
+#if ARCH_ARM
+# include "arm/vp8.h"
+#endif
+
+#if CONFIG_VP7_DECODER && CONFIG_VP8_DECODER
+#define VPX(vp7, f) (vp7 ? vp7_ ## f : vp8_ ## f)
+#elif CONFIG_VP7_DECODER
+#define VPX(vp7, f) vp7_ ## f
+#else // CONFIG_VP8_DECODER
+#define VPX(vp7, f) vp8_ ## f
+#endif
+
+static void free_buffers(VP8Context *s)
+{
+ int i;
+ if (s->thread_data)
+ for (i = 0; i < MAX_THREADS; i++) {
+#if HAVE_THREADS
+ pthread_cond_destroy(&s->thread_data[i].cond);
+ pthread_mutex_destroy(&s->thread_data[i].lock);
+#endif
+ av_freep(&s->thread_data[i].filter_strength);
+ }
+ av_freep(&s->thread_data);
+ av_freep(&s->macroblocks_base);
+ av_freep(&s->intra4x4_pred_mode_top);
+ av_freep(&s->top_nnz);
+ av_freep(&s->top_border);
+
+ s->macroblocks = NULL;
+}
+
+static int vp8_alloc_frame(VP8Context *s, VP8Frame *f, int ref)
+{
+ int ret;
+ if ((ret = ff_thread_get_buffer(s->avctx, &f->tf,
+ ref ? AV_GET_BUFFER_FLAG_REF : 0)) < 0)
+ return ret;
+ if (!(f->seg_map = av_buffer_allocz(s->mb_width * s->mb_height))) {
+ ff_thread_release_buffer(s->avctx, &f->tf);
+ return AVERROR(ENOMEM);
+ }
+ return 0;
+}
+
+static void vp8_release_frame(VP8Context *s, VP8Frame *f)
+{
+ av_buffer_unref(&f->seg_map);
+ ff_thread_release_buffer(s->avctx, &f->tf);
+}
+
+#if CONFIG_VP8_DECODER
+static int vp8_ref_frame(VP8Context *s, VP8Frame *dst, VP8Frame *src)
+{
+ int ret;
+
+ vp8_release_frame(s, dst);
+
+ if ((ret = ff_thread_ref_frame(&dst->tf, &src->tf)) < 0)
+ return ret;
+ if (src->seg_map &&
+ !(dst->seg_map = av_buffer_ref(src->seg_map))) {
+ vp8_release_frame(s, dst);
+ return AVERROR(ENOMEM);
+ }
+
+ return 0;
+}
+#endif /* CONFIG_VP8_DECODER */
+
+static void vp8_decode_flush_impl(AVCodecContext *avctx, int free_mem)
+{
+ VP8Context *s = avctx->priv_data;
+ int i;
+
+ for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++)
+ vp8_release_frame(s, &s->frames[i]);
+ memset(s->framep, 0, sizeof(s->framep));
+
+ if (free_mem)
+ free_buffers(s);
+}
+
+static void vp8_decode_flush(AVCodecContext *avctx)
+{
+ vp8_decode_flush_impl(avctx, 0);
+}
+
+static VP8Frame *vp8_find_free_buffer(VP8Context *s)
+{
+ VP8Frame *frame = NULL;
+ int i;
+
+ // find a free buffer
+ for (i = 0; i < 5; i++)
+ if (&s->frames[i] != s->framep[VP56_FRAME_CURRENT] &&
+ &s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] &&
+ &s->frames[i] != s->framep[VP56_FRAME_GOLDEN] &&
+ &s->frames[i] != s->framep[VP56_FRAME_GOLDEN2]) {
+ frame = &s->frames[i];
+ break;
+ }
+ if (i == 5) {
+ av_log(s->avctx, AV_LOG_FATAL, "Ran out of free frames!\n");
+ abort();
+ }
+ if (frame->tf.f->data[0])
+ vp8_release_frame(s, frame);
+
+ return frame;
+}
+
+static av_always_inline
+int update_dimensions(VP8Context *s, int width, int height, int is_vp7)
+{
+ AVCodecContext *avctx = s->avctx;
+ int i, ret;
+
+ if (width != s->avctx->width || ((width+15)/16 != s->mb_width || (height+15)/16 != s->mb_height) && s->macroblocks_base ||
+ height != s->avctx->height) {
+ vp8_decode_flush_impl(s->avctx, 1);
+
+ ret = ff_set_dimensions(s->avctx, width, height);
+ if (ret < 0)
+ return ret;
+ }
+
+ s->mb_width = (s->avctx->coded_width + 15) / 16;
+ s->mb_height = (s->avctx->coded_height + 15) / 16;
+
+ s->mb_layout = is_vp7 || avctx->active_thread_type == FF_THREAD_SLICE &&
+ avctx->thread_count > 1;
+ if (!s->mb_layout) { // Frame threading and one thread
+ s->macroblocks_base = av_mallocz((s->mb_width + s->mb_height * 2 + 1) *
+ sizeof(*s->macroblocks));
+ s->intra4x4_pred_mode_top = av_mallocz(s->mb_width * 4);
+ } else // Sliced threading
+ s->macroblocks_base = av_mallocz((s->mb_width + 2) * (s->mb_height + 2) *
+ sizeof(*s->macroblocks));
+ s->top_nnz = av_mallocz(s->mb_width * sizeof(*s->top_nnz));
+ s->top_border = av_mallocz((s->mb_width + 1) * sizeof(*s->top_border));
+ s->thread_data = av_mallocz(MAX_THREADS * sizeof(VP8ThreadData));
+
+ if (!s->macroblocks_base || !s->top_nnz || !s->top_border ||
+ !s->thread_data || (!s->intra4x4_pred_mode_top && !s->mb_layout)) {
+ free_buffers(s);
+ return AVERROR(ENOMEM);
+ }
+
+ for (i = 0; i < MAX_THREADS; i++) {
+ s->thread_data[i].filter_strength =
+ av_mallocz(s->mb_width * sizeof(*s->thread_data[0].filter_strength));
+ if (!s->thread_data[i].filter_strength) {
+ free_buffers(s);
+ return AVERROR(ENOMEM);
+ }
+#if HAVE_THREADS
+ pthread_mutex_init(&s->thread_data[i].lock, NULL);
+ pthread_cond_init(&s->thread_data[i].cond, NULL);
+#endif
+ }
+
+ s->macroblocks = s->macroblocks_base + 1;
+
+ return 0;
+}
+
+static int vp7_update_dimensions(VP8Context *s, int width, int height)
+{
+ return update_dimensions(s, width, height, IS_VP7);
+}
+
+static int vp8_update_dimensions(VP8Context *s, int width, int height)
+{
+ return update_dimensions(s, width, height, IS_VP8);
+}
+
+
+static void parse_segment_info(VP8Context *s)
+{
+ VP56RangeCoder *c = &s->c;
+ int i;
+
+ s->segmentation.update_map = vp8_rac_get(c);
+
+ if (vp8_rac_get(c)) { // update segment feature data
+ s->segmentation.absolute_vals = vp8_rac_get(c);
+
+ for (i = 0; i < 4; i++)
+ s->segmentation.base_quant[i] = vp8_rac_get_sint(c, 7);
+
+ for (i = 0; i < 4; i++)
+ s->segmentation.filter_level[i] = vp8_rac_get_sint(c, 6);
+ }
+ if (s->segmentation.update_map)
+ for (i = 0; i < 3; i++)
+ s->prob->segmentid[i] = vp8_rac_get(c) ? vp8_rac_get_uint(c, 8) : 255;
+}
+
+static void update_lf_deltas(VP8Context *s)
+{
+ VP56RangeCoder *c = &s->c;
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ if (vp8_rac_get(c)) {
+ s->lf_delta.ref[i] = vp8_rac_get_uint(c, 6);
+
+ if (vp8_rac_get(c))
+ s->lf_delta.ref[i] = -s->lf_delta.ref[i];
+ }
+ }
+
+ for (i = MODE_I4x4; i <= VP8_MVMODE_SPLIT; i++) {
+ if (vp8_rac_get(c)) {
+ s->lf_delta.mode[i] = vp8_rac_get_uint(c, 6);
+
+ if (vp8_rac_get(c))
+ s->lf_delta.mode[i] = -s->lf_delta.mode[i];
+ }
+ }
+}
+
+static int setup_partitions(VP8Context *s, const uint8_t *buf, int buf_size)
+{
+ const uint8_t *sizes = buf;
+ int i;
+
+ s->num_coeff_partitions = 1 << vp8_rac_get_uint(&s->c, 2);
+
+ buf += 3 * (s->num_coeff_partitions - 1);
+ buf_size -= 3 * (s->num_coeff_partitions - 1);
+ if (buf_size < 0)
+ return -1;
+
+ for (i = 0; i < s->num_coeff_partitions - 1; i++) {
+ int size = AV_RL24(sizes + 3 * i);
+ if (buf_size - size < 0)
+ return -1;
+
+ ff_vp56_init_range_decoder(&s->coeff_partition[i], buf, size);
+ buf += size;
+ buf_size -= size;
+ }
+ ff_vp56_init_range_decoder(&s->coeff_partition[i], buf, buf_size);
+
+ return 0;
+}
+
+static void vp7_get_quants(VP8Context *s)
+{
+ VP56RangeCoder *c = &s->c;
+
+ int yac_qi = vp8_rac_get_uint(c, 7);
+ int ydc_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi;
+ int y2dc_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi;
+ int y2ac_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi;
+ int uvdc_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi;
+ int uvac_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi;
+
+ s->qmat[0].luma_qmul[0] = vp7_ydc_qlookup[ydc_qi];
+ s->qmat[0].luma_qmul[1] = vp7_yac_qlookup[yac_qi];
+ s->qmat[0].luma_dc_qmul[0] = vp7_y2dc_qlookup[y2dc_qi];
+ s->qmat[0].luma_dc_qmul[1] = vp7_y2ac_qlookup[y2ac_qi];
+ s->qmat[0].chroma_qmul[0] = FFMIN(vp7_ydc_qlookup[uvdc_qi], 132);
+ s->qmat[0].chroma_qmul[1] = vp7_yac_qlookup[uvac_qi];
+}
+
+static void vp8_get_quants(VP8Context *s)
+{
+ VP56RangeCoder *c = &s->c;
+ int i, base_qi;
+
+ int yac_qi = vp8_rac_get_uint(c, 7);
+ int ydc_delta = vp8_rac_get_sint(c, 4);
+ int y2dc_delta = vp8_rac_get_sint(c, 4);
+ int y2ac_delta = vp8_rac_get_sint(c, 4);
+ int uvdc_delta = vp8_rac_get_sint(c, 4);
+ int uvac_delta = vp8_rac_get_sint(c, 4);
+
+ for (i = 0; i < 4; i++) {
+ if (s->segmentation.enabled) {
+ base_qi = s->segmentation.base_quant[i];
+ if (!s->segmentation.absolute_vals)
+ base_qi += yac_qi;
+ } else
+ base_qi = yac_qi;
+
+ s->qmat[i].luma_qmul[0] = vp8_dc_qlookup[av_clip_uintp2(base_qi + ydc_delta, 7)];
+ s->qmat[i].luma_qmul[1] = vp8_ac_qlookup[av_clip_uintp2(base_qi, 7)];
+ s->qmat[i].luma_dc_qmul[0] = vp8_dc_qlookup[av_clip_uintp2(base_qi + y2dc_delta, 7)] * 2;
+ /* 101581>>16 is equivalent to 155/100 */
+ s->qmat[i].luma_dc_qmul[1] = vp8_ac_qlookup[av_clip_uintp2(base_qi + y2ac_delta, 7)] * 101581 >> 16;
+ s->qmat[i].chroma_qmul[0] = vp8_dc_qlookup[av_clip_uintp2(base_qi + uvdc_delta, 7)];
+ s->qmat[i].chroma_qmul[1] = vp8_ac_qlookup[av_clip_uintp2(base_qi + uvac_delta, 7)];
+
+ s->qmat[i].luma_dc_qmul[1] = FFMAX(s->qmat[i].luma_dc_qmul[1], 8);
+ s->qmat[i].chroma_qmul[0] = FFMIN(s->qmat[i].chroma_qmul[0], 132);
+ }
+}
+
+/**
+ * Determine which buffers golden and altref should be updated with after this frame.
+ * The spec isn't clear here, so I'm going by my understanding of what libvpx does
+ *
+ * Intra frames update all 3 references
+ * Inter frames update VP56_FRAME_PREVIOUS if the update_last flag is set
+ * If the update (golden|altref) flag is set, it's updated with the current frame
+ * if update_last is set, and VP56_FRAME_PREVIOUS otherwise.
+ * If the flag is not set, the number read means:
+ * 0: no update
+ * 1: VP56_FRAME_PREVIOUS
+ * 2: update golden with altref, or update altref with golden
+ */
+static VP56Frame ref_to_update(VP8Context *s, int update, VP56Frame ref)
+{
+ VP56RangeCoder *c = &s->c;
+
+ if (update)
+ return VP56_FRAME_CURRENT;
+
+ switch (vp8_rac_get_uint(c, 2)) {
+ case 1:
+ return VP56_FRAME_PREVIOUS;
+ case 2:
+ return (ref == VP56_FRAME_GOLDEN) ? VP56_FRAME_GOLDEN2 : VP56_FRAME_GOLDEN;
+ }
+ return VP56_FRAME_NONE;
+}
+
+static void vp78_reset_probability_tables(VP8Context *s)
+{
+ int i, j;
+ for (i = 0; i < 4; i++)
+ for (j = 0; j < 16; j++)
+ memcpy(s->prob->token[i][j], vp8_token_default_probs[i][vp8_coeff_band[j]],
+ sizeof(s->prob->token[i][j]));
+}
+
+static void vp78_update_probability_tables(VP8Context *s)
+{
+ VP56RangeCoder *c = &s->c;
+ int i, j, k, l, m;
+
+ for (i = 0; i < 4; i++)
+ for (j = 0; j < 8; j++)
+ for (k = 0; k < 3; k++)
+ for (l = 0; l < NUM_DCT_TOKENS-1; l++)
+ if (vp56_rac_get_prob_branchy(c, vp8_token_update_probs[i][j][k][l])) {
+ int prob = vp8_rac_get_uint(c, 8);
+ for (m = 0; vp8_coeff_band_indexes[j][m] >= 0; m++)
+ s->prob->token[i][vp8_coeff_band_indexes[j][m]][k][l] = prob;
+ }
+}
+
+#define VP7_MVC_SIZE 17
+#define VP8_MVC_SIZE 19
+
+static void vp78_update_pred16x16_pred8x8_mvc_probabilities(VP8Context *s,
+ int mvc_size)
+{
+ VP56RangeCoder *c = &s->c;
+ int i, j;
+
+ if (vp8_rac_get(c))
+ for (i = 0; i < 4; i++)
+ s->prob->pred16x16[i] = vp8_rac_get_uint(c, 8);
+ if (vp8_rac_get(c))
+ for (i = 0; i < 3; i++)
+ s->prob->pred8x8c[i] = vp8_rac_get_uint(c, 8);
+
+ // 17.2 MV probability update
+ for (i = 0; i < 2; i++)
+ for (j = 0; j < mvc_size; j++)
+ if (vp56_rac_get_prob_branchy(c, vp8_mv_update_prob[i][j]))
+ s->prob->mvc[i][j] = vp8_rac_get_nn(c);
+}
+
+static void update_refs(VP8Context *s)
+{
+ VP56RangeCoder *c = &s->c;
+
+ int update_golden = vp8_rac_get(c);
+ int update_altref = vp8_rac_get(c);
+
+ s->update_golden = ref_to_update(s, update_golden, VP56_FRAME_GOLDEN);
+ s->update_altref = ref_to_update(s, update_altref, VP56_FRAME_GOLDEN2);
+}
+
+static void copy_chroma(AVFrame *dst, AVFrame *src, int width, int height)
+{
+ int i, j;
+
+ for (j = 1; j < 3; j++) {
+ for (i = 0; i < height / 2; i++)
+ memcpy(dst->data[j] + i * dst->linesize[j],
+ src->data[j] + i * src->linesize[j], width / 2);
+ }
+}
+
+static void fade(uint8_t *dst, int dst_linesize,
+ const uint8_t *src, int src_linesize,
+ int width, int height,
+ int alpha, int beta)
+{
+ int i, j;
+ for (j = 0; j < height; j++) {
+ for (i = 0; i < width; i++) {
+ uint8_t y = src[j * src_linesize + i];
+ dst[j * dst_linesize + i] = av_clip_uint8(y + ((y * beta) >> 8) + alpha);
+ }
+ }
+}
+
+static int vp7_fade_frame(VP8Context *s, VP56RangeCoder *c)
+{
+ int alpha = (int8_t) vp8_rac_get_uint(c, 8);
+ int beta = (int8_t) vp8_rac_get_uint(c, 8);
+ int ret;
+
+ if (!s->keyframe && (alpha || beta)) {
+ int width = s->mb_width * 16;
+ int height = s->mb_height * 16;
+ AVFrame *src, *dst;
+
+ if (!s->framep[VP56_FRAME_PREVIOUS] ||
+ !s->framep[VP56_FRAME_GOLDEN]) {
+ av_log(s->avctx, AV_LOG_WARNING, "Discarding interframe without a prior keyframe!\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ dst =
+ src = s->framep[VP56_FRAME_PREVIOUS]->tf.f;
+
+ /* preserve the golden frame, write a new previous frame */
+ if (s->framep[VP56_FRAME_GOLDEN] == s->framep[VP56_FRAME_PREVIOUS]) {
+ s->framep[VP56_FRAME_PREVIOUS] = vp8_find_free_buffer(s);
+ if ((ret = vp8_alloc_frame(s, s->framep[VP56_FRAME_PREVIOUS], 1)) < 0)
+ return ret;
+
+ dst = s->framep[VP56_FRAME_PREVIOUS]->tf.f;
+
+ copy_chroma(dst, src, width, height);
+ }
+
+ fade(dst->data[0], dst->linesize[0],
+ src->data[0], src->linesize[0],
+ width, height, alpha, beta);
+ }
+
+ return 0;
+}
+
+static int vp7_decode_frame_header(VP8Context *s, const uint8_t *buf, int buf_size)
+{
+ VP56RangeCoder *c = &s->c;
+ int part1_size, hscale, vscale, i, j, ret;
+ int width = s->avctx->width;
+ int height = s->avctx->height;
+
+ if (buf_size < 4) {
+ return AVERROR_INVALIDDATA;
+ }
+
+ s->profile = (buf[0] >> 1) & 7;
+ if (s->profile > 1) {
+ avpriv_request_sample(s->avctx, "Unknown profile %d", s->profile);
+ return AVERROR_INVALIDDATA;
+ }
+
+ s->keyframe = !(buf[0] & 1);
+ s->invisible = 0;
+ part1_size = AV_RL24(buf) >> 4;
+
+ if (buf_size < 4 - s->profile + part1_size) {
+ av_log(s->avctx, AV_LOG_ERROR, "Buffer size %d is too small, needed : %d\n", buf_size, 4 - s->profile + part1_size);
+ return AVERROR_INVALIDDATA;
+ }
+
+ buf += 4 - s->profile;
+ buf_size -= 4 - s->profile;
+
+ memcpy(s->put_pixels_tab, s->vp8dsp.put_vp8_epel_pixels_tab, sizeof(s->put_pixels_tab));
+
+ ff_vp56_init_range_decoder(c, buf, part1_size);
+ buf += part1_size;
+ buf_size -= part1_size;
+
+ /* A. Dimension information (keyframes only) */
+ if (s->keyframe) {
+ width = vp8_rac_get_uint(c, 12);
+ height = vp8_rac_get_uint(c, 12);
+ hscale = vp8_rac_get_uint(c, 2);
+ vscale = vp8_rac_get_uint(c, 2);
+ if (hscale || vscale)
+ avpriv_request_sample(s->avctx, "Upscaling");
+
+ s->update_golden = s->update_altref = VP56_FRAME_CURRENT;
+ vp78_reset_probability_tables(s);
+ memcpy(s->prob->pred16x16, vp8_pred16x16_prob_inter,
+ sizeof(s->prob->pred16x16));
+ memcpy(s->prob->pred8x8c, vp8_pred8x8c_prob_inter,
+ sizeof(s->prob->pred8x8c));
+ for (i = 0; i < 2; i++)
+ memcpy(s->prob->mvc[i], vp7_mv_default_prob[i],
+ sizeof(vp7_mv_default_prob[i]));
+ memset(&s->segmentation, 0, sizeof(s->segmentation));
+ memset(&s->lf_delta, 0, sizeof(s->lf_delta));
+ memcpy(s->prob[0].scan, ff_zigzag_scan, sizeof(s->prob[0].scan));
+ }
+
+ if (s->keyframe || s->profile > 0)
+ memset(s->inter_dc_pred, 0 , sizeof(s->inter_dc_pred));
+
+ /* B. Decoding information for all four macroblock-level features */
+ for (i = 0; i < 4; i++) {
+ s->feature_enabled[i] = vp8_rac_get(c);
+ if (s->feature_enabled[i]) {
+ s->feature_present_prob[i] = vp8_rac_get_uint(c, 8);
+
+ for (j = 0; j < 3; j++)
+ s->feature_index_prob[i][j] =
+ vp8_rac_get(c) ? vp8_rac_get_uint(c, 8) : 255;
+
+ if (vp7_feature_value_size[s->profile][i])
+ for (j = 0; j < 4; j++)
+ s->feature_value[i][j] =
+ vp8_rac_get(c) ? vp8_rac_get_uint(c, vp7_feature_value_size[s->profile][i]) : 0;
+ }
+ }
+
+ s->segmentation.enabled = 0;
+ s->segmentation.update_map = 0;
+ s->lf_delta.enabled = 0;
+
+ s->num_coeff_partitions = 1;
+ ff_vp56_init_range_decoder(&s->coeff_partition[0], buf, buf_size);
+
+ if (!s->macroblocks_base || /* first frame */
+ width != s->avctx->width || height != s->avctx->height ||
+ (width + 15) / 16 != s->mb_width || (height + 15) / 16 != s->mb_height) {
+ if ((ret = vp7_update_dimensions(s, width, height)) < 0)
+ return ret;
+ }
+
+ /* C. Dequantization indices */
+ vp7_get_quants(s);
+
+ /* D. Golden frame update flag (a Flag) for interframes only */
+ if (!s->keyframe) {
+ s->update_golden = vp8_rac_get(c) ? VP56_FRAME_CURRENT : VP56_FRAME_NONE;
+ s->sign_bias[VP56_FRAME_GOLDEN] = 0;
+ }
+
+ s->update_last = 1;
+ s->update_probabilities = 1;
+ s->fade_present = 1;
+
+ if (s->profile > 0) {
+ s->update_probabilities = vp8_rac_get(c);
+ if (!s->update_probabilities)
+ s->prob[1] = s->prob[0];
+
+ if (!s->keyframe)
+ s->fade_present = vp8_rac_get(c);
+ }
+
+ /* E. Fading information for previous frame */
+ if (s->fade_present && vp8_rac_get(c)) {
+ if ((ret = vp7_fade_frame(s ,c)) < 0)
+ return ret;
+ }
+
+ /* F. Loop filter type */
+ if (!s->profile)
+ s->filter.simple = vp8_rac_get(c);
+
+ /* G. DCT coefficient ordering specification */
+ if (vp8_rac_get(c))
+ for (i = 1; i < 16; i++)
+ s->prob[0].scan[i] = ff_zigzag_scan[vp8_rac_get_uint(c, 4)];
+
+ /* H. Loop filter levels */
+ if (s->profile > 0)
+ s->filter.simple = vp8_rac_get(c);
+ s->filter.level = vp8_rac_get_uint(c, 6);
+ s->filter.sharpness = vp8_rac_get_uint(c, 3);
+
+ /* I. DCT coefficient probability update; 13.3 Token Probability Updates */
+ vp78_update_probability_tables(s);
+
+ s->mbskip_enabled = 0;
+
+ /* J. The remaining frame header data occurs ONLY FOR INTERFRAMES */
+ if (!s->keyframe) {
+ s->prob->intra = vp8_rac_get_uint(c, 8);
+ s->prob->last = vp8_rac_get_uint(c, 8);
+ vp78_update_pred16x16_pred8x8_mvc_probabilities(s, VP7_MVC_SIZE);
+ }
+
+ return 0;
+}
+
+static int vp8_decode_frame_header(VP8Context *s, const uint8_t *buf, int buf_size)
+{
+ VP56RangeCoder *c = &s->c;
+ int header_size, hscale, vscale, ret;
+ int width = s->avctx->width;
+ int height = s->avctx->height;
+
+ if (buf_size < 3) {
+ av_log(s->avctx, AV_LOG_ERROR, "Insufficent data (%d) for header\n", buf_size);
+ return AVERROR_INVALIDDATA;
+ }
+
+ s->keyframe = !(buf[0] & 1);
+ s->profile = (buf[0]>>1) & 7;
+ s->invisible = !(buf[0] & 0x10);
+ header_size = AV_RL24(buf) >> 5;
+ buf += 3;
+ buf_size -= 3;
+
+ if (s->profile > 3)
+ av_log(s->avctx, AV_LOG_WARNING, "Unknown profile %d\n", s->profile);
+
+ if (!s->profile)
+ memcpy(s->put_pixels_tab, s->vp8dsp.put_vp8_epel_pixels_tab,
+ sizeof(s->put_pixels_tab));
+ else // profile 1-3 use bilinear, 4+ aren't defined so whatever
+ memcpy(s->put_pixels_tab, s->vp8dsp.put_vp8_bilinear_pixels_tab,
+ sizeof(s->put_pixels_tab));
+
+ if (header_size > buf_size - 7 * s->keyframe) {
+ av_log(s->avctx, AV_LOG_ERROR, "Header size larger than data provided\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (s->keyframe) {
+ if (AV_RL24(buf) != 0x2a019d) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Invalid start code 0x%x\n", AV_RL24(buf));
+ return AVERROR_INVALIDDATA;
+ }
+ width = AV_RL16(buf + 3) & 0x3fff;
+ height = AV_RL16(buf + 5) & 0x3fff;
+ hscale = buf[4] >> 6;
+ vscale = buf[6] >> 6;
+ buf += 7;
+ buf_size -= 7;
+
+ if (hscale || vscale)
+ avpriv_request_sample(s->avctx, "Upscaling");
+
+ s->update_golden = s->update_altref = VP56_FRAME_CURRENT;
+ vp78_reset_probability_tables(s);
+ memcpy(s->prob->pred16x16, vp8_pred16x16_prob_inter,
+ sizeof(s->prob->pred16x16));
+ memcpy(s->prob->pred8x8c, vp8_pred8x8c_prob_inter,
+ sizeof(s->prob->pred8x8c));
+ memcpy(s->prob->mvc, vp8_mv_default_prob,
+ sizeof(s->prob->mvc));
+ memset(&s->segmentation, 0, sizeof(s->segmentation));
+ memset(&s->lf_delta, 0, sizeof(s->lf_delta));
+ }
+
+ ff_vp56_init_range_decoder(c, buf, header_size);
+ buf += header_size;
+ buf_size -= header_size;
+
+ if (s->keyframe) {
+ s->colorspace = vp8_rac_get(c);
+ if (s->colorspace)
+ av_log(s->avctx, AV_LOG_WARNING, "Unspecified colorspace\n");
+ s->fullrange = vp8_rac_get(c);
+ }
+
+ if ((s->segmentation.enabled = vp8_rac_get(c)))
+ parse_segment_info(s);
+ else
+ s->segmentation.update_map = 0; // FIXME: move this to some init function?
+
+ s->filter.simple = vp8_rac_get(c);
+ s->filter.level = vp8_rac_get_uint(c, 6);
+ s->filter.sharpness = vp8_rac_get_uint(c, 3);
+
+ if ((s->lf_delta.enabled = vp8_rac_get(c)))
+ if (vp8_rac_get(c))
+ update_lf_deltas(s);
+
+ if (setup_partitions(s, buf, buf_size)) {
+ av_log(s->avctx, AV_LOG_ERROR, "Invalid partitions\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (!s->macroblocks_base || /* first frame */
+ width != s->avctx->width || height != s->avctx->height ||
+ (width+15)/16 != s->mb_width || (height+15)/16 != s->mb_height)
+ if ((ret = vp8_update_dimensions(s, width, height)) < 0)
+ return ret;
+
+ vp8_get_quants(s);
+
+ if (!s->keyframe) {
+ update_refs(s);
+ s->sign_bias[VP56_FRAME_GOLDEN] = vp8_rac_get(c);
+ s->sign_bias[VP56_FRAME_GOLDEN2 /* altref */] = vp8_rac_get(c);
+ }
+
+ // if we aren't saving this frame's probabilities for future frames,
+ // make a copy of the current probabilities
+ if (!(s->update_probabilities = vp8_rac_get(c)))
+ s->prob[1] = s->prob[0];
+
+ s->update_last = s->keyframe || vp8_rac_get(c);
+
+ vp78_update_probability_tables(s);
+
+ if ((s->mbskip_enabled = vp8_rac_get(c)))
+ s->prob->mbskip = vp8_rac_get_uint(c, 8);
+
+ if (!s->keyframe) {
+ s->prob->intra = vp8_rac_get_uint(c, 8);
+ s->prob->last = vp8_rac_get_uint(c, 8);
+ s->prob->golden = vp8_rac_get_uint(c, 8);
+ vp78_update_pred16x16_pred8x8_mvc_probabilities(s, VP8_MVC_SIZE);
+ }
+
+ return 0;
+}
+
+static av_always_inline
+void clamp_mv(VP8Context *s, VP56mv *dst, const VP56mv *src)
+{
+ dst->x = av_clip(src->x, av_clip(s->mv_min.x, INT16_MIN, INT16_MAX),
+ av_clip(s->mv_max.x, INT16_MIN, INT16_MAX));
+ dst->y = av_clip(src->y, av_clip(s->mv_min.y, INT16_MIN, INT16_MAX),
+ av_clip(s->mv_max.y, INT16_MIN, INT16_MAX));
+}
+
+/**
+ * Motion vector coding, 17.1.
+ */
+static av_always_inline int read_mv_component(VP56RangeCoder *c, const uint8_t *p, int vp7)
+{
+ int bit, x = 0;
+
+ if (vp56_rac_get_prob_branchy(c, p[0])) {
+ int i;
+
+ for (i = 0; i < 3; i++)
+ x += vp56_rac_get_prob(c, p[9 + i]) << i;
+ for (i = (vp7 ? 7 : 9); i > 3; i--)
+ x += vp56_rac_get_prob(c, p[9 + i]) << i;
+ if (!(x & (vp7 ? 0xF0 : 0xFFF0)) || vp56_rac_get_prob(c, p[12]))
+ x += 8;
+ } else {
+ // small_mvtree
+ const uint8_t *ps = p + 2;
+ bit = vp56_rac_get_prob(c, *ps);
+ ps += 1 + 3 * bit;
+ x += 4 * bit;
+ bit = vp56_rac_get_prob(c, *ps);
+ ps += 1 + bit;
+ x += 2 * bit;
+ x += vp56_rac_get_prob(c, *ps);
+ }
+
+ return (x && vp56_rac_get_prob(c, p[1])) ? -x : x;
+}
+
+static int vp7_read_mv_component(VP56RangeCoder *c, const uint8_t *p)
+{
+ return read_mv_component(c, p, 1);
+}
+
+static int vp8_read_mv_component(VP56RangeCoder *c, const uint8_t *p)
+{
+ return read_mv_component(c, p, 0);
+}
+
+static av_always_inline
+const uint8_t *get_submv_prob(uint32_t left, uint32_t top, int is_vp7)
+{
+ if (is_vp7)
+ return vp7_submv_prob;
+
+ if (left == top)
+ return vp8_submv_prob[4 - !!left];
+ if (!top)
+ return vp8_submv_prob[2];
+ return vp8_submv_prob[1 - !!left];
+}
+
+/**
+ * Split motion vector prediction, 16.4.
+ * @returns the number of motion vectors parsed (2, 4 or 16)
+ */
+static av_always_inline
+int decode_splitmvs(VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb,
+ int layout, int is_vp7)
+{
+ int part_idx;
+ int n, num;
+ VP8Macroblock *top_mb;
+ VP8Macroblock *left_mb = &mb[-1];
+ const uint8_t *mbsplits_left = vp8_mbsplits[left_mb->partitioning];
+ const uint8_t *mbsplits_top, *mbsplits_cur, *firstidx;
+ VP56mv *top_mv;
+ VP56mv *left_mv = left_mb->bmv;
+ VP56mv *cur_mv = mb->bmv;
+
+ if (!layout) // layout is inlined, s->mb_layout is not
+ top_mb = &mb[2];
+ else
+ top_mb = &mb[-s->mb_width - 1];
+ mbsplits_top = vp8_mbsplits[top_mb->partitioning];
+ top_mv = top_mb->bmv;
+
+ if (vp56_rac_get_prob_branchy(c, vp8_mbsplit_prob[0])) {
+ if (vp56_rac_get_prob_branchy(c, vp8_mbsplit_prob[1]))
+ part_idx = VP8_SPLITMVMODE_16x8 + vp56_rac_get_prob(c, vp8_mbsplit_prob[2]);
+ else
+ part_idx = VP8_SPLITMVMODE_8x8;
+ } else {
+ part_idx = VP8_SPLITMVMODE_4x4;
+ }
+
+ num = vp8_mbsplit_count[part_idx];
+ mbsplits_cur = vp8_mbsplits[part_idx],
+ firstidx = vp8_mbfirstidx[part_idx];
+ mb->partitioning = part_idx;
+
+ for (n = 0; n < num; n++) {
+ int k = firstidx[n];
+ uint32_t left, above;
+ const uint8_t *submv_prob;
+
+ if (!(k & 3))
+ left = AV_RN32A(&left_mv[mbsplits_left[k + 3]]);
+ else
+ left = AV_RN32A(&cur_mv[mbsplits_cur[k - 1]]);
+ if (k <= 3)
+ above = AV_RN32A(&top_mv[mbsplits_top[k + 12]]);
+ else
+ above = AV_RN32A(&cur_mv[mbsplits_cur[k - 4]]);
+
+ submv_prob = get_submv_prob(left, above, is_vp7);
+
+ if (vp56_rac_get_prob_branchy(c, submv_prob[0])) {
+ if (vp56_rac_get_prob_branchy(c, submv_prob[1])) {
+ if (vp56_rac_get_prob_branchy(c, submv_prob[2])) {
+ mb->bmv[n].y = mb->mv.y +
+ read_mv_component(c, s->prob->mvc[0], is_vp7);
+ mb->bmv[n].x = mb->mv.x +
+ read_mv_component(c, s->prob->mvc[1], is_vp7);
+ } else {
+ AV_ZERO32(&mb->bmv[n]);
+ }
+ } else {
+ AV_WN32A(&mb->bmv[n], above);
+ }
+ } else {
+ AV_WN32A(&mb->bmv[n], left);
+ }
+ }
+
+ return num;
+}
+
+/**
+ * The vp7 reference decoder uses a padding macroblock column (added to right
+ * edge of the frame) to guard against illegal macroblock offsets. The
+ * algorithm has bugs that permit offsets to straddle the padding column.
+ * This function replicates those bugs.
+ *
+ * @param[out] edge_x macroblock x address
+ * @param[out] edge_y macroblock y address
+ *
+ * @return macroblock offset legal (boolean)
+ */
+static int vp7_calculate_mb_offset(int mb_x, int mb_y, int mb_width,
+ int xoffset, int yoffset, int boundary,
+ int *edge_x, int *edge_y)
+{
+ int vwidth = mb_width + 1;
+ int new = (mb_y + yoffset) * vwidth + mb_x + xoffset;
+ if (new < boundary || new % vwidth == vwidth - 1)
+ return 0;
+ *edge_y = new / vwidth;
+ *edge_x = new % vwidth;
+ return 1;
+}
+
+static const VP56mv *get_bmv_ptr(const VP8Macroblock *mb, int subblock)
+{
+ return &mb->bmv[mb->mode == VP8_MVMODE_SPLIT ? vp8_mbsplits[mb->partitioning][subblock] : 0];
+}
+
+static av_always_inline
+void vp7_decode_mvs(VP8Context *s, VP8Macroblock *mb,
+ int mb_x, int mb_y, int layout)
+{
+ VP8Macroblock *mb_edge[12];
+ enum { CNT_ZERO, CNT_NEAREST, CNT_NEAR };
+ enum { VP8_EDGE_TOP, VP8_EDGE_LEFT, VP8_EDGE_TOPLEFT };
+ int idx = CNT_ZERO;
+ VP56mv near_mv[3];
+ uint8_t cnt[3] = { 0 };
+ VP56RangeCoder *c = &s->c;
+ int i;
+
+ AV_ZERO32(&near_mv[0]);
+ AV_ZERO32(&near_mv[1]);
+ AV_ZERO32(&near_mv[2]);
+
+ for (i = 0; i < VP7_MV_PRED_COUNT; i++) {
+ const VP7MVPred * pred = &vp7_mv_pred[i];
+ int edge_x, edge_y;
+
+ if (vp7_calculate_mb_offset(mb_x, mb_y, s->mb_width, pred->xoffset,
+ pred->yoffset, !s->profile, &edge_x, &edge_y)) {
+ VP8Macroblock *edge = mb_edge[i] = (s->mb_layout == 1)
+ ? s->macroblocks_base + 1 + edge_x +
+ (s->mb_width + 1) * (edge_y + 1)
+ : s->macroblocks + edge_x +
+ (s->mb_height - edge_y - 1) * 2;
+ uint32_t mv = AV_RN32A(get_bmv_ptr(edge, vp7_mv_pred[i].subblock));
+ if (mv) {
+ if (AV_RN32A(&near_mv[CNT_NEAREST])) {
+ if (mv == AV_RN32A(&near_mv[CNT_NEAREST])) {
+ idx = CNT_NEAREST;
+ } else if (AV_RN32A(&near_mv[CNT_NEAR])) {
+ if (mv != AV_RN32A(&near_mv[CNT_NEAR]))
+ continue;
+ idx = CNT_NEAR;
+ } else {
+ AV_WN32A(&near_mv[CNT_NEAR], mv);
+ idx = CNT_NEAR;
+ }
+ } else {
+ AV_WN32A(&near_mv[CNT_NEAREST], mv);
+ idx = CNT_NEAREST;
+ }
+ } else {
+ idx = CNT_ZERO;
+ }
+ } else {
+ idx = CNT_ZERO;
+ }
+ cnt[idx] += vp7_mv_pred[i].score;
+ }
+
+ mb->partitioning = VP8_SPLITMVMODE_NONE;
+
+ if (vp56_rac_get_prob_branchy(c, vp7_mode_contexts[cnt[CNT_ZERO]][0])) {
+ mb->mode = VP8_MVMODE_MV;
+
+ if (vp56_rac_get_prob_branchy(c, vp7_mode_contexts[cnt[CNT_NEAREST]][1])) {
+
+ if (vp56_rac_get_prob_branchy(c, vp7_mode_contexts[cnt[CNT_NEAR]][2])) {
+
+ if (cnt[CNT_NEAREST] > cnt[CNT_NEAR])
+ AV_WN32A(&mb->mv, cnt[CNT_ZERO] > cnt[CNT_NEAREST] ? 0 : AV_RN32A(&near_mv[CNT_NEAREST]));
+ else
+ AV_WN32A(&mb->mv, cnt[CNT_ZERO] > cnt[CNT_NEAR] ? 0 : AV_RN32A(&near_mv[CNT_NEAR]));
+
+ if (vp56_rac_get_prob_branchy(c, vp7_mode_contexts[cnt[CNT_NEAR]][3])) {
+ mb->mode = VP8_MVMODE_SPLIT;
+ mb->mv = mb->bmv[decode_splitmvs(s, c, mb, layout, IS_VP7) - 1];
+ } else {
+ mb->mv.y += vp7_read_mv_component(c, s->prob->mvc[0]);
+ mb->mv.x += vp7_read_mv_component(c, s->prob->mvc[1]);
+ mb->bmv[0] = mb->mv;
+ }
+ } else {
+ mb->mv = near_mv[CNT_NEAR];
+ mb->bmv[0] = mb->mv;
+ }
+ } else {
+ mb->mv = near_mv[CNT_NEAREST];
+ mb->bmv[0] = mb->mv;
+ }
+ } else {
+ mb->mode = VP8_MVMODE_ZERO;
+ AV_ZERO32(&mb->mv);
+ mb->bmv[0] = mb->mv;
+ }
+}
+
+static av_always_inline
+void vp8_decode_mvs(VP8Context *s, VP8Macroblock *mb,
+ int mb_x, int mb_y, int layout)
+{
+ VP8Macroblock *mb_edge[3] = { 0 /* top */,
+ mb - 1 /* left */,
+ 0 /* top-left */ };
+ enum { CNT_ZERO, CNT_NEAREST, CNT_NEAR, CNT_SPLITMV };
+ enum { VP8_EDGE_TOP, VP8_EDGE_LEFT, VP8_EDGE_TOPLEFT };
+ int idx = CNT_ZERO;
+ int cur_sign_bias = s->sign_bias[mb->ref_frame];
+ int8_t *sign_bias = s->sign_bias;
+ VP56mv near_mv[4];
+ uint8_t cnt[4] = { 0 };
+ VP56RangeCoder *c = &s->c;
+
+ if (!layout) { // layout is inlined (s->mb_layout is not)
+ mb_edge[0] = mb + 2;
+ mb_edge[2] = mb + 1;
+ } else {
+ mb_edge[0] = mb - s->mb_width - 1;
+ mb_edge[2] = mb - s->mb_width - 2;
+ }
+
+ AV_ZERO32(&near_mv[0]);
+ AV_ZERO32(&near_mv[1]);
+ AV_ZERO32(&near_mv[2]);
+
+ /* Process MB on top, left and top-left */
+#define MV_EDGE_CHECK(n) \
+ { \
+ VP8Macroblock *edge = mb_edge[n]; \
+ int edge_ref = edge->ref_frame; \
+ if (edge_ref != VP56_FRAME_CURRENT) { \
+ uint32_t mv = AV_RN32A(&edge->mv); \
+ if (mv) { \
+ if (cur_sign_bias != sign_bias[edge_ref]) { \
+ /* SWAR negate of the values in mv. */ \
+ mv = ~mv; \
+ mv = ((mv & 0x7fff7fff) + \
+ 0x00010001) ^ (mv & 0x80008000); \
+ } \
+ if (!n || mv != AV_RN32A(&near_mv[idx])) \
+ AV_WN32A(&near_mv[++idx], mv); \
+ cnt[idx] += 1 + (n != 2); \
+ } else \
+ cnt[CNT_ZERO] += 1 + (n != 2); \
+ } \
+ }
+
+ MV_EDGE_CHECK(0)
+ MV_EDGE_CHECK(1)
+ MV_EDGE_CHECK(2)
+
+ mb->partitioning = VP8_SPLITMVMODE_NONE;
+ if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[CNT_ZERO]][0])) {
+ mb->mode = VP8_MVMODE_MV;
+
+ /* If we have three distinct MVs, merge first and last if they're the same */
+ if (cnt[CNT_SPLITMV] &&
+ AV_RN32A(&near_mv[1 + VP8_EDGE_TOP]) == AV_RN32A(&near_mv[1 + VP8_EDGE_TOPLEFT]))
+ cnt[CNT_NEAREST] += 1;
+
+ /* Swap near and nearest if necessary */
+ if (cnt[CNT_NEAR] > cnt[CNT_NEAREST]) {
+ FFSWAP(uint8_t, cnt[CNT_NEAREST], cnt[CNT_NEAR]);
+ FFSWAP( VP56mv, near_mv[CNT_NEAREST], near_mv[CNT_NEAR]);
+ }
+
+ if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[CNT_NEAREST]][1])) {
+ if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[CNT_NEAR]][2])) {
+ /* Choose the best mv out of 0,0 and the nearest mv */
+ clamp_mv(s, &mb->mv, &near_mv[CNT_ZERO + (cnt[CNT_NEAREST] >= cnt[CNT_ZERO])]);
+ cnt[CNT_SPLITMV] = ((mb_edge[VP8_EDGE_LEFT]->mode == VP8_MVMODE_SPLIT) +
+ (mb_edge[VP8_EDGE_TOP]->mode == VP8_MVMODE_SPLIT)) * 2 +
+ (mb_edge[VP8_EDGE_TOPLEFT]->mode == VP8_MVMODE_SPLIT);
+
+ if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[CNT_SPLITMV]][3])) {
+ mb->mode = VP8_MVMODE_SPLIT;
+ mb->mv = mb->bmv[decode_splitmvs(s, c, mb, layout, IS_VP8) - 1];
+ } else {
+ mb->mv.y += vp8_read_mv_component(c, s->prob->mvc[0]);
+ mb->mv.x += vp8_read_mv_component(c, s->prob->mvc[1]);
+ mb->bmv[0] = mb->mv;
+ }
+ } else {
+ clamp_mv(s, &mb->mv, &near_mv[CNT_NEAR]);
+ mb->bmv[0] = mb->mv;
+ }
+ } else {
+ clamp_mv(s, &mb->mv, &near_mv[CNT_NEAREST]);
+ mb->bmv[0] = mb->mv;
+ }
+ } else {
+ mb->mode = VP8_MVMODE_ZERO;
+ AV_ZERO32(&mb->mv);
+ mb->bmv[0] = mb->mv;
+ }
+}
+
+static av_always_inline
+void decode_intra4x4_modes(VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb,
+ int mb_x, int keyframe, int layout)
+{
+ uint8_t *intra4x4 = mb->intra4x4_pred_mode_mb;
+
+ if (layout) {
+ VP8Macroblock *mb_top = mb - s->mb_width - 1;
+ memcpy(mb->intra4x4_pred_mode_top, mb_top->intra4x4_pred_mode_top, 4);
+ }
+ if (keyframe) {
+ int x, y;
+ uint8_t *top;
+ uint8_t *const left = s->intra4x4_pred_mode_left;
+ if (layout)
+ top = mb->intra4x4_pred_mode_top;
+ else
+ top = s->intra4x4_pred_mode_top + 4 * mb_x;
+ for (y = 0; y < 4; y++) {
+ for (x = 0; x < 4; x++) {
+ const uint8_t *ctx;
+ ctx = vp8_pred4x4_prob_intra[top[x]][left[y]];
+ *intra4x4 = vp8_rac_get_tree(c, vp8_pred4x4_tree, ctx);
+ left[y] = top[x] = *intra4x4;
+ intra4x4++;
+ }
+ }
+ } else {
+ int i;
+ for (i = 0; i < 16; i++)
+ intra4x4[i] = vp8_rac_get_tree(c, vp8_pred4x4_tree,
+ vp8_pred4x4_prob_inter);
+ }
+}
+
+static av_always_inline
+void decode_mb_mode(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y,
+ uint8_t *segment, uint8_t *ref, int layout, int is_vp7)
+{
+ VP56RangeCoder *c = &s->c;
+ static const char *vp7_feature_name[] = { "q-index",
+ "lf-delta",
+ "partial-golden-update",
+ "blit-pitch" };
+ if (is_vp7) {
+ int i;
+ *segment = 0;
+ for (i = 0; i < 4; i++) {
+ if (s->feature_enabled[i]) {
+ if (vp56_rac_get_prob_branchy(c, s->feature_present_prob[i])) {
+ int index = vp8_rac_get_tree(c, vp7_feature_index_tree,
+ s->feature_index_prob[i]);
+ av_log(s->avctx, AV_LOG_WARNING,
+ "Feature %s present in macroblock (value 0x%x)\n",
+ vp7_feature_name[i], s->feature_value[i][index]);
+ }
+ }
+ }
+ } else if (s->segmentation.update_map) {
+ int bit = vp56_rac_get_prob(c, s->prob->segmentid[0]);
+ *segment = vp56_rac_get_prob(c, s->prob->segmentid[1+bit]) + 2*bit;
+ } else if (s->segmentation.enabled)
+ *segment = ref ? *ref : *segment;
+ mb->segment = *segment;
+
+ mb->skip = s->mbskip_enabled ? vp56_rac_get_prob(c, s->prob->mbskip) : 0;
+
+ if (s->keyframe) {
+ mb->mode = vp8_rac_get_tree(c, vp8_pred16x16_tree_intra,
+ vp8_pred16x16_prob_intra);
+
+ if (mb->mode == MODE_I4x4) {
+ decode_intra4x4_modes(s, c, mb, mb_x, 1, layout);
+ } else {
+ const uint32_t modes = (is_vp7 ? vp7_pred4x4_mode
+ : vp8_pred4x4_mode)[mb->mode] * 0x01010101u;
+ if (s->mb_layout)
+ AV_WN32A(mb->intra4x4_pred_mode_top, modes);
+ else
+ AV_WN32A(s->intra4x4_pred_mode_top + 4 * mb_x, modes);
+ AV_WN32A(s->intra4x4_pred_mode_left, modes);
+ }
+
+ mb->chroma_pred_mode = vp8_rac_get_tree(c, vp8_pred8x8c_tree,
+ vp8_pred8x8c_prob_intra);
+ mb->ref_frame = VP56_FRAME_CURRENT;
+ } else if (vp56_rac_get_prob_branchy(c, s->prob->intra)) {
+ // inter MB, 16.2
+ if (vp56_rac_get_prob_branchy(c, s->prob->last))
+ mb->ref_frame =
+ (!is_vp7 && vp56_rac_get_prob(c, s->prob->golden)) ? VP56_FRAME_GOLDEN2 /* altref */
+ : VP56_FRAME_GOLDEN;
+ else
+ mb->ref_frame = VP56_FRAME_PREVIOUS;
+ s->ref_count[mb->ref_frame - 1]++;
+
+ // motion vectors, 16.3
+ if (is_vp7)
+ vp7_decode_mvs(s, mb, mb_x, mb_y, layout);
+ else
+ vp8_decode_mvs(s, mb, mb_x, mb_y, layout);
+ } else {
+ // intra MB, 16.1
+ mb->mode = vp8_rac_get_tree(c, vp8_pred16x16_tree_inter, s->prob->pred16x16);
+
+ if (mb->mode == MODE_I4x4)
+ decode_intra4x4_modes(s, c, mb, mb_x, 0, layout);
+
+ mb->chroma_pred_mode = vp8_rac_get_tree(c, vp8_pred8x8c_tree,
+ s->prob->pred8x8c);
+ mb->ref_frame = VP56_FRAME_CURRENT;
+ mb->partitioning = VP8_SPLITMVMODE_NONE;
+ AV_ZERO32(&mb->bmv[0]);
+ }
+}
+
+/**
+ * @param r arithmetic bitstream reader context
+ * @param block destination for block coefficients
+ * @param probs probabilities to use when reading trees from the bitstream
+ * @param i initial coeff index, 0 unless a separate DC block is coded
+ * @param qmul array holding the dc/ac dequant factor at position 0/1
+ *
+ * @return 0 if no coeffs were decoded
+ * otherwise, the index of the last coeff decoded plus one
+ */
+static av_always_inline
+int decode_block_coeffs_internal(VP56RangeCoder *r, int16_t block[16],
+ uint8_t probs[16][3][NUM_DCT_TOKENS - 1],
+ int i, uint8_t *token_prob, int16_t qmul[2],
+ const uint8_t scan[16], int vp7)
+{
+ VP56RangeCoder c = *r;
+ goto skip_eob;
+ do {
+ int coeff;
+restart:
+ if (!vp56_rac_get_prob_branchy(&c, token_prob[0])) // DCT_EOB
+ break;
+
+skip_eob:
+ if (!vp56_rac_get_prob_branchy(&c, token_prob[1])) { // DCT_0
+ if (++i == 16)
+ break; // invalid input; blocks should end with EOB
+ token_prob = probs[i][0];
+ if (vp7)
+ goto restart;
+ goto skip_eob;
+ }
+
+ if (!vp56_rac_get_prob_branchy(&c, token_prob[2])) { // DCT_1
+ coeff = 1;
+ token_prob = probs[i + 1][1];
+ } else {
+ if (!vp56_rac_get_prob_branchy(&c, token_prob[3])) { // DCT 2,3,4
+ coeff = vp56_rac_get_prob_branchy(&c, token_prob[4]);
+ if (coeff)
+ coeff += vp56_rac_get_prob(&c, token_prob[5]);
+ coeff += 2;
+ } else {
+ // DCT_CAT*
+ if (!vp56_rac_get_prob_branchy(&c, token_prob[6])) {
+ if (!vp56_rac_get_prob_branchy(&c, token_prob[7])) { // DCT_CAT1
+ coeff = 5 + vp56_rac_get_prob(&c, vp8_dct_cat1_prob[0]);
+ } else { // DCT_CAT2
+ coeff = 7;
+ coeff += vp56_rac_get_prob(&c, vp8_dct_cat2_prob[0]) << 1;
+ coeff += vp56_rac_get_prob(&c, vp8_dct_cat2_prob[1]);
+ }
+ } else { // DCT_CAT3 and up
+ int a = vp56_rac_get_prob(&c, token_prob[8]);
+ int b = vp56_rac_get_prob(&c, token_prob[9 + a]);
+ int cat = (a << 1) + b;
+ coeff = 3 + (8 << cat);
+ coeff += vp8_rac_get_coeff(&c, ff_vp8_dct_cat_prob[cat]);
+ }
+ }
+ token_prob = probs[i + 1][2];
+ }
+ block[scan[i]] = (vp8_rac_get(&c) ? -coeff : coeff) * qmul[!!i];
+ } while (++i < 16);
+
+ *r = c;
+ return i;
+}
+
+static av_always_inline
+int inter_predict_dc(int16_t block[16], int16_t pred[2])
+{
+ int16_t dc = block[0];
+ int ret = 0;
+
+ if (pred[1] > 3) {
+ dc += pred[0];
+ ret = 1;
+ }
+
+ if (!pred[0] | !dc | ((int32_t)pred[0] ^ (int32_t)dc) >> 31) {
+ block[0] = pred[0] = dc;
+ pred[1] = 0;
+ } else {
+ if (pred[0] == dc)
+ pred[1]++;
+ block[0] = pred[0] = dc;
+ }
+
+ return ret;
+}
+
+static int vp7_decode_block_coeffs_internal(VP56RangeCoder *r,
+ int16_t block[16],
+ uint8_t probs[16][3][NUM_DCT_TOKENS - 1],
+ int i, uint8_t *token_prob,
+ int16_t qmul[2],
+ const uint8_t scan[16])
+{
+ return decode_block_coeffs_internal(r, block, probs, i,
+ token_prob, qmul, scan, IS_VP7);
+}
+
+#ifndef vp8_decode_block_coeffs_internal
+static int vp8_decode_block_coeffs_internal(VP56RangeCoder *r,
+ int16_t block[16],
+ uint8_t probs[16][3][NUM_DCT_TOKENS - 1],
+ int i, uint8_t *token_prob,
+ int16_t qmul[2])
+{
+ return decode_block_coeffs_internal(r, block, probs, i,
+ token_prob, qmul, ff_zigzag_scan, IS_VP8);
+}
+#endif
+
+/**
+ * @param c arithmetic bitstream reader context
+ * @param block destination for block coefficients
+ * @param probs probabilities to use when reading trees from the bitstream
+ * @param i initial coeff index, 0 unless a separate DC block is coded
+ * @param zero_nhood the initial prediction context for number of surrounding
+ * all-zero blocks (only left/top, so 0-2)
+ * @param qmul array holding the dc/ac dequant factor at position 0/1
+ * @param scan scan pattern (VP7 only)
+ *
+ * @return 0 if no coeffs were decoded
+ * otherwise, the index of the last coeff decoded plus one
+ */
+static av_always_inline
+int decode_block_coeffs(VP56RangeCoder *c, int16_t block[16],
+ uint8_t probs[16][3][NUM_DCT_TOKENS - 1],
+ int i, int zero_nhood, int16_t qmul[2],
+ const uint8_t scan[16], int vp7)
+{
+ uint8_t *token_prob = probs[i][zero_nhood];
+ if (!vp56_rac_get_prob_branchy(c, token_prob[0])) // DCT_EOB
+ return 0;
+ return vp7 ? vp7_decode_block_coeffs_internal(c, block, probs, i,
+ token_prob, qmul, scan)
+ : vp8_decode_block_coeffs_internal(c, block, probs, i,
+ token_prob, qmul);
+}
+
+static av_always_inline
+void decode_mb_coeffs(VP8Context *s, VP8ThreadData *td, VP56RangeCoder *c,
+ VP8Macroblock *mb, uint8_t t_nnz[9], uint8_t l_nnz[9],
+ int is_vp7)
+{
+ int i, x, y, luma_start = 0, luma_ctx = 3;
+ int nnz_pred, nnz, nnz_total = 0;
+ int segment = mb->segment;
+ int block_dc = 0;
+
+ if (mb->mode != MODE_I4x4 && (is_vp7 || mb->mode != VP8_MVMODE_SPLIT)) {
+ nnz_pred = t_nnz[8] + l_nnz[8];
+
+ // decode DC values and do hadamard
+ nnz = decode_block_coeffs(c, td->block_dc, s->prob->token[1], 0,
+ nnz_pred, s->qmat[segment].luma_dc_qmul,
+ ff_zigzag_scan, is_vp7);
+ l_nnz[8] = t_nnz[8] = !!nnz;
+
+ if (is_vp7 && mb->mode > MODE_I4x4) {
+ nnz |= inter_predict_dc(td->block_dc,
+ s->inter_dc_pred[mb->ref_frame - 1]);
+ }
+
+ if (nnz) {
+ nnz_total += nnz;
+ block_dc = 1;
+ if (nnz == 1)
+ s->vp8dsp.vp8_luma_dc_wht_dc(td->block, td->block_dc);
+ else
+ s->vp8dsp.vp8_luma_dc_wht(td->block, td->block_dc);
+ }
+ luma_start = 1;
+ luma_ctx = 0;
+ }
+
+ // luma blocks
+ for (y = 0; y < 4; y++)
+ for (x = 0; x < 4; x++) {
+ nnz_pred = l_nnz[y] + t_nnz[x];
+ nnz = decode_block_coeffs(c, td->block[y][x],
+ s->prob->token[luma_ctx],
+ luma_start, nnz_pred,
+ s->qmat[segment].luma_qmul,
+ s->prob[0].scan, is_vp7);
+ /* nnz+block_dc may be one more than the actual last index,
+ * but we don't care */
+ td->non_zero_count_cache[y][x] = nnz + block_dc;
+ t_nnz[x] = l_nnz[y] = !!nnz;
+ nnz_total += nnz;
+ }
+
+ // chroma blocks
+ // TODO: what to do about dimensions? 2nd dim for luma is x,
+ // but for chroma it's (y<<1)|x
+ for (i = 4; i < 6; i++)
+ for (y = 0; y < 2; y++)
+ for (x = 0; x < 2; x++) {
+ nnz_pred = l_nnz[i + 2 * y] + t_nnz[i + 2 * x];
+ nnz = decode_block_coeffs(c, td->block[i][(y << 1) + x],
+ s->prob->token[2], 0, nnz_pred,
+ s->qmat[segment].chroma_qmul,
+ s->prob[0].scan, is_vp7);
+ td->non_zero_count_cache[i][(y << 1) + x] = nnz;
+ t_nnz[i + 2 * x] = l_nnz[i + 2 * y] = !!nnz;
+ nnz_total += nnz;
+ }
+
+ // if there were no coded coeffs despite the macroblock not being marked skip,
+ // we MUST not do the inner loop filter and should not do IDCT
+ // Since skip isn't used for bitstream prediction, just manually set it.
+ if (!nnz_total)
+ mb->skip = 1;
+}
+
+static av_always_inline
+void backup_mb_border(uint8_t *top_border, uint8_t *src_y,
+ uint8_t *src_cb, uint8_t *src_cr,
+ int linesize, int uvlinesize, int simple)
+{
+ AV_COPY128(top_border, src_y + 15 * linesize);
+ if (!simple) {
+ AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
+ AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
+ }
+}
+
+static av_always_inline
+void xchg_mb_border(uint8_t *top_border, uint8_t *src_y, uint8_t *src_cb,
+ uint8_t *src_cr, int linesize, int uvlinesize, int mb_x,
+ int mb_y, int mb_width, int simple, int xchg)
+{
+ uint8_t *top_border_m1 = top_border - 32; // for TL prediction
+ src_y -= linesize;
+ src_cb -= uvlinesize;
+ src_cr -= uvlinesize;
+
+#define XCHG(a, b, xchg) \
+ do { \
+ if (xchg) \
+ AV_SWAP64(b, a); \
+ else \
+ AV_COPY64(b, a); \
+ } while (0)
+
+ XCHG(top_border_m1 + 8, src_y - 8, xchg);
+ XCHG(top_border, src_y, xchg);
+ XCHG(top_border + 8, src_y + 8, 1);
+ if (mb_x < mb_width - 1)
+ XCHG(top_border + 32, src_y + 16, 1);
+
+ // only copy chroma for normal loop filter
+ // or to initialize the top row to 127
+ if (!simple || !mb_y) {
+ XCHG(top_border_m1 + 16, src_cb - 8, xchg);
+ XCHG(top_border_m1 + 24, src_cr - 8, xchg);
+ XCHG(top_border + 16, src_cb, 1);
+ XCHG(top_border + 24, src_cr, 1);
+ }
+}
+
+static av_always_inline
+int check_dc_pred8x8_mode(int mode, int mb_x, int mb_y)
+{
+ if (!mb_x)
+ return mb_y ? TOP_DC_PRED8x8 : DC_128_PRED8x8;
+ else
+ return mb_y ? mode : LEFT_DC_PRED8x8;
+}
+
+static av_always_inline
+int check_tm_pred8x8_mode(int mode, int mb_x, int mb_y, int vp7)
+{
+ if (!mb_x)
+ return mb_y ? VERT_PRED8x8 : (vp7 ? DC_128_PRED8x8 : DC_129_PRED8x8);
+ else
+ return mb_y ? mode : HOR_PRED8x8;
+}
+
+static av_always_inline
+int check_intra_pred8x8_mode_emuedge(int mode, int mb_x, int mb_y, int vp7)
+{
+ switch (mode) {
+ case DC_PRED8x8:
+ return check_dc_pred8x8_mode(mode, mb_x, mb_y);
+ case VERT_PRED8x8:
+ return !mb_y ? (vp7 ? DC_128_PRED8x8 : DC_127_PRED8x8) : mode;
+ case HOR_PRED8x8:
+ return !mb_x ? (vp7 ? DC_128_PRED8x8 : DC_129_PRED8x8) : mode;
+ case PLANE_PRED8x8: /* TM */
+ return check_tm_pred8x8_mode(mode, mb_x, mb_y, vp7);
+ }
+ return mode;
+}
+
+static av_always_inline
+int check_tm_pred4x4_mode(int mode, int mb_x, int mb_y, int vp7)
+{
+ if (!mb_x) {
+ return mb_y ? VERT_VP8_PRED : (vp7 ? DC_128_PRED : DC_129_PRED);
+ } else {
+ return mb_y ? mode : HOR_VP8_PRED;
+ }
+}
+
+static av_always_inline
+int check_intra_pred4x4_mode_emuedge(int mode, int mb_x, int mb_y,
+ int *copy_buf, int vp7)
+{
+ switch (mode) {
+ case VERT_PRED:
+ if (!mb_x && mb_y) {
+ *copy_buf = 1;
+ return mode;
+ }
+ /* fall-through */
+ case DIAG_DOWN_LEFT_PRED:
+ case VERT_LEFT_PRED:
+ return !mb_y ? (vp7 ? DC_128_PRED : DC_127_PRED) : mode;
+ case HOR_PRED:
+ if (!mb_y) {
+ *copy_buf = 1;
+ return mode;
+ }
+ /* fall-through */
+ case HOR_UP_PRED:
+ return !mb_x ? (vp7 ? DC_128_PRED : DC_129_PRED) : mode;
+ case TM_VP8_PRED:
+ return check_tm_pred4x4_mode(mode, mb_x, mb_y, vp7);
+ case DC_PRED: /* 4x4 DC doesn't use the same "H.264-style" exceptions
+ * as 16x16/8x8 DC */
+ case DIAG_DOWN_RIGHT_PRED:
+ case VERT_RIGHT_PRED:
+ case HOR_DOWN_PRED:
+ if (!mb_y || !mb_x)
+ *copy_buf = 1;
+ return mode;
+ }
+ return mode;
+}
+
+static av_always_inline
+void intra_predict(VP8Context *s, VP8ThreadData *td, uint8_t *dst[3],
+ VP8Macroblock *mb, int mb_x, int mb_y, int is_vp7)
+{
+ int x, y, mode, nnz;
+ uint32_t tr;
+
+ /* for the first row, we need to run xchg_mb_border to init the top edge
+ * to 127 otherwise, skip it if we aren't going to deblock */
+ if (mb_y && (s->deblock_filter || !mb_y) && td->thread_nr == 0)
+ xchg_mb_border(s->top_border[mb_x + 1], dst[0], dst[1], dst[2],
+ s->linesize, s->uvlinesize, mb_x, mb_y, s->mb_width,
+ s->filter.simple, 1);
+
+ if (mb->mode < MODE_I4x4) {
+ mode = check_intra_pred8x8_mode_emuedge(mb->mode, mb_x, mb_y, is_vp7);
+ s->hpc.pred16x16[mode](dst[0], s->linesize);
+ } else {
+ uint8_t *ptr = dst[0];
+ uint8_t *intra4x4 = mb->intra4x4_pred_mode_mb;
+ const uint8_t lo = is_vp7 ? 128 : 127;
+ const uint8_t hi = is_vp7 ? 128 : 129;
+ uint8_t tr_top[4] = { lo, lo, lo, lo };
+
+ // all blocks on the right edge of the macroblock use bottom edge
+ // the top macroblock for their topright edge
+ uint8_t *tr_right = ptr - s->linesize + 16;
+
+ // if we're on the right edge of the frame, said edge is extended
+ // from the top macroblock
+ if (mb_y && mb_x == s->mb_width - 1) {
+ tr = tr_right[-1] * 0x01010101u;
+ tr_right = (uint8_t *) &tr;
+ }
+
+ if (mb->skip)
+ AV_ZERO128(td->non_zero_count_cache);
+
+ for (y = 0; y < 4; y++) {
+ uint8_t *topright = ptr + 4 - s->linesize;
+ for (x = 0; x < 4; x++) {
+ int copy = 0, linesize = s->linesize;
+ uint8_t *dst = ptr + 4 * x;
+ LOCAL_ALIGNED(4, uint8_t, copy_dst, [5 * 8]);
+
+ if ((y == 0 || x == 3) && mb_y == 0) {
+ topright = tr_top;
+ } else if (x == 3)
+ topright = tr_right;
+
+ mode = check_intra_pred4x4_mode_emuedge(intra4x4[x], mb_x + x,
+ mb_y + y, &copy, is_vp7);
+ if (copy) {
+ dst = copy_dst + 12;
+ linesize = 8;
+ if (!(mb_y + y)) {
+ copy_dst[3] = lo;
+ AV_WN32A(copy_dst + 4, lo * 0x01010101U);
+ } else {
+ AV_COPY32(copy_dst + 4, ptr + 4 * x - s->linesize);
+ if (!(mb_x + x)) {
+ copy_dst[3] = hi;
+ } else {
+ copy_dst[3] = ptr[4 * x - s->linesize - 1];
+ }
+ }
+ if (!(mb_x + x)) {
+ copy_dst[11] =
+ copy_dst[19] =
+ copy_dst[27] =
+ copy_dst[35] = hi;
+ } else {
+ copy_dst[11] = ptr[4 * x - 1];
+ copy_dst[19] = ptr[4 * x + s->linesize - 1];
+ copy_dst[27] = ptr[4 * x + s->linesize * 2 - 1];
+ copy_dst[35] = ptr[4 * x + s->linesize * 3 - 1];
+ }
+ }
+ s->hpc.pred4x4[mode](dst, topright, linesize);
+ if (copy) {
+ AV_COPY32(ptr + 4 * x, copy_dst + 12);
+ AV_COPY32(ptr + 4 * x + s->linesize, copy_dst + 20);
+ AV_COPY32(ptr + 4 * x + s->linesize * 2, copy_dst + 28);
+ AV_COPY32(ptr + 4 * x + s->linesize * 3, copy_dst + 36);
+ }
+
+ nnz = td->non_zero_count_cache[y][x];
+ if (nnz) {
+ if (nnz == 1)
+ s->vp8dsp.vp8_idct_dc_add(ptr + 4 * x,
+ td->block[y][x], s->linesize);
+ else
+ s->vp8dsp.vp8_idct_add(ptr + 4 * x,
+ td->block[y][x], s->linesize);
+ }
+ topright += 4;
+ }
+
+ ptr += 4 * s->linesize;
+ intra4x4 += 4;
+ }
+ }
+
+ mode = check_intra_pred8x8_mode_emuedge(mb->chroma_pred_mode,
+ mb_x, mb_y, is_vp7);
+ s->hpc.pred8x8[mode](dst[1], s->uvlinesize);
+ s->hpc.pred8x8[mode](dst[2], s->uvlinesize);
+
+ if (mb_y && (s->deblock_filter || !mb_y) && td->thread_nr == 0)
+ xchg_mb_border(s->top_border[mb_x + 1], dst[0], dst[1], dst[2],
+ s->linesize, s->uvlinesize, mb_x, mb_y, s->mb_width,
+ s->filter.simple, 0);
+}
+
+static const uint8_t subpel_idx[3][8] = {
+ { 0, 1, 2, 1, 2, 1, 2, 1 }, // nr. of left extra pixels,
+ // also function pointer index
+ { 0, 3, 5, 3, 5, 3, 5, 3 }, // nr. of extra pixels required
+ { 0, 2, 3, 2, 3, 2, 3, 2 }, // nr. of right extra pixels
+};
+
+/**
+ * luma MC function
+ *
+ * @param s VP8 decoding context
+ * @param dst target buffer for block data at block position
+ * @param ref reference picture buffer at origin (0, 0)
+ * @param mv motion vector (relative to block position) to get pixel data from
+ * @param x_off horizontal position of block from origin (0, 0)
+ * @param y_off vertical position of block from origin (0, 0)
+ * @param block_w width of block (16, 8 or 4)
+ * @param block_h height of block (always same as block_w)
+ * @param width width of src/dst plane data
+ * @param height height of src/dst plane data
+ * @param linesize size of a single line of plane data, including padding
+ * @param mc_func motion compensation function pointers (bilinear or sixtap MC)
+ */
+static av_always_inline
+void vp8_mc_luma(VP8Context *s, VP8ThreadData *td, uint8_t *dst,
+ ThreadFrame *ref, const VP56mv *mv,
+ int x_off, int y_off, int block_w, int block_h,
+ int width, int height, ptrdiff_t linesize,
+ vp8_mc_func mc_func[3][3])
+{
+ uint8_t *src = ref->f->data[0];
+
+ if (AV_RN32A(mv)) {
+ int src_linesize = linesize;
+
+ int mx = (mv->x * 2) & 7, mx_idx = subpel_idx[0][mx];
+ int my = (mv->y * 2) & 7, my_idx = subpel_idx[0][my];
+
+ x_off += mv->x >> 2;
+ y_off += mv->y >> 2;
+
+ // edge emulation
+ ff_thread_await_progress(ref, (3 + y_off + block_h + subpel_idx[2][my]) >> 4, 0);
+ src += y_off * linesize + x_off;
+ if (x_off < mx_idx || x_off >= width - block_w - subpel_idx[2][mx] ||
+ y_off < my_idx || y_off >= height - block_h - subpel_idx[2][my]) {
+ s->vdsp.emulated_edge_mc(td->edge_emu_buffer,
+ src - my_idx * linesize - mx_idx,
+ EDGE_EMU_LINESIZE, linesize,
+ block_w + subpel_idx[1][mx],
+ block_h + subpel_idx[1][my],
+ x_off - mx_idx, y_off - my_idx,
+ width, height);
+ src = td->edge_emu_buffer + mx_idx + EDGE_EMU_LINESIZE * my_idx;
+ src_linesize = EDGE_EMU_LINESIZE;
+ }
+ mc_func[my_idx][mx_idx](dst, linesize, src, src_linesize, block_h, mx, my);
+ } else {
+ ff_thread_await_progress(ref, (3 + y_off + block_h) >> 4, 0);
+ mc_func[0][0](dst, linesize, src + y_off * linesize + x_off,
+ linesize, block_h, 0, 0);
+ }
+}
+
+/**
+ * chroma MC function
+ *
+ * @param s VP8 decoding context
+ * @param dst1 target buffer for block data at block position (U plane)
+ * @param dst2 target buffer for block data at block position (V plane)
+ * @param ref reference picture buffer at origin (0, 0)
+ * @param mv motion vector (relative to block position) to get pixel data from
+ * @param x_off horizontal position of block from origin (0, 0)
+ * @param y_off vertical position of block from origin (0, 0)
+ * @param block_w width of block (16, 8 or 4)
+ * @param block_h height of block (always same as block_w)
+ * @param width width of src/dst plane data
+ * @param height height of src/dst plane data
+ * @param linesize size of a single line of plane data, including padding
+ * @param mc_func motion compensation function pointers (bilinear or sixtap MC)
+ */
+static av_always_inline
+void vp8_mc_chroma(VP8Context *s, VP8ThreadData *td, uint8_t *dst1,
+ uint8_t *dst2, ThreadFrame *ref, const VP56mv *mv,
+ int x_off, int y_off, int block_w, int block_h,
+ int width, int height, ptrdiff_t linesize,
+ vp8_mc_func mc_func[3][3])
+{
+ uint8_t *src1 = ref->f->data[1], *src2 = ref->f->data[2];
+
+ if (AV_RN32A(mv)) {
+ int mx = mv->x & 7, mx_idx = subpel_idx[0][mx];
+ int my = mv->y & 7, my_idx = subpel_idx[0][my];
+
+ x_off += mv->x >> 3;
+ y_off += mv->y >> 3;
+
+ // edge emulation
+ src1 += y_off * linesize + x_off;
+ src2 += y_off * linesize + x_off;
+ ff_thread_await_progress(ref, (3 + y_off + block_h + subpel_idx[2][my]) >> 3, 0);
+ if (x_off < mx_idx || x_off >= width - block_w - subpel_idx[2][mx] ||
+ y_off < my_idx || y_off >= height - block_h - subpel_idx[2][my]) {
+ s->vdsp.emulated_edge_mc(td->edge_emu_buffer,
+ src1 - my_idx * linesize - mx_idx,
+ EDGE_EMU_LINESIZE, linesize,
+ block_w + subpel_idx[1][mx],
+ block_h + subpel_idx[1][my],
+ x_off - mx_idx, y_off - my_idx, width, height);
+ src1 = td->edge_emu_buffer + mx_idx + EDGE_EMU_LINESIZE * my_idx;
+ mc_func[my_idx][mx_idx](dst1, linesize, src1, EDGE_EMU_LINESIZE, block_h, mx, my);
+
+ s->vdsp.emulated_edge_mc(td->edge_emu_buffer,
+ src2 - my_idx * linesize - mx_idx,
+ EDGE_EMU_LINESIZE, linesize,
+ block_w + subpel_idx[1][mx],
+ block_h + subpel_idx[1][my],
+ x_off - mx_idx, y_off - my_idx, width, height);
+ src2 = td->edge_emu_buffer + mx_idx + EDGE_EMU_LINESIZE * my_idx;
+ mc_func[my_idx][mx_idx](dst2, linesize, src2, EDGE_EMU_LINESIZE, block_h, mx, my);
+ } else {
+ mc_func[my_idx][mx_idx](dst1, linesize, src1, linesize, block_h, mx, my);
+ mc_func[my_idx][mx_idx](dst2, linesize, src2, linesize, block_h, mx, my);
+ }
+ } else {
+ ff_thread_await_progress(ref, (3 + y_off + block_h) >> 3, 0);
+ mc_func[0][0](dst1, linesize, src1 + y_off * linesize + x_off, linesize, block_h, 0, 0);
+ mc_func[0][0](dst2, linesize, src2 + y_off * linesize + x_off, linesize, block_h, 0, 0);
+ }
+}
+
+static av_always_inline
+void vp8_mc_part(VP8Context *s, VP8ThreadData *td, uint8_t *dst[3],
+ ThreadFrame *ref_frame, int x_off, int y_off,
+ int bx_off, int by_off, int block_w, int block_h,
+ int width, int height, VP56mv *mv)
+{
+ VP56mv uvmv = *mv;
+
+ /* Y */
+ vp8_mc_luma(s, td, dst[0] + by_off * s->linesize + bx_off,
+ ref_frame, mv, x_off + bx_off, y_off + by_off,
+ block_w, block_h, width, height, s->linesize,
+ s->put_pixels_tab[block_w == 8]);
+
+ /* U/V */
+ if (s->profile == 3) {
+ /* this block only applies VP8; it is safe to check
+ * only the profile, as VP7 profile <= 1 */
+ uvmv.x &= ~7;
+ uvmv.y &= ~7;
+ }
+ x_off >>= 1;
+ y_off >>= 1;
+ bx_off >>= 1;
+ by_off >>= 1;
+ width >>= 1;
+ height >>= 1;
+ block_w >>= 1;
+ block_h >>= 1;
+ vp8_mc_chroma(s, td, dst[1] + by_off * s->uvlinesize + bx_off,
+ dst[2] + by_off * s->uvlinesize + bx_off, ref_frame,
+ &uvmv, x_off + bx_off, y_off + by_off,
+ block_w, block_h, width, height, s->uvlinesize,
+ s->put_pixels_tab[1 + (block_w == 4)]);
+}
+
+/* Fetch pixels for estimated mv 4 macroblocks ahead.
+ * Optimized for 64-byte cache lines. Inspired by ffh264 prefetch_motion. */
+static av_always_inline
+void prefetch_motion(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y,
+ int mb_xy, int ref)
+{
+ /* Don't prefetch refs that haven't been used very often this frame. */
+ if (s->ref_count[ref - 1] > (mb_xy >> 5)) {
+ int x_off = mb_x << 4, y_off = mb_y << 4;
+ int mx = (mb->mv.x >> 2) + x_off + 8;
+ int my = (mb->mv.y >> 2) + y_off;
+ uint8_t **src = s->framep[ref]->tf.f->data;
+ int off = mx + (my + (mb_x & 3) * 4) * s->linesize + 64;
+ /* For threading, a ff_thread_await_progress here might be useful, but
+ * it actually slows down the decoder. Since a bad prefetch doesn't
+ * generate bad decoder output, we don't run it here. */
+ s->vdsp.prefetch(src[0] + off, s->linesize, 4);
+ off = (mx >> 1) + ((my >> 1) + (mb_x & 7)) * s->uvlinesize + 64;
+ s->vdsp.prefetch(src[1] + off, src[2] - src[1], 2);
+ }
+}
+
+/**
+ * Apply motion vectors to prediction buffer, chapter 18.
+ */
+static av_always_inline
+void inter_predict(VP8Context *s, VP8ThreadData *td, uint8_t *dst[3],
+ VP8Macroblock *mb, int mb_x, int mb_y)
+{
+ int x_off = mb_x << 4, y_off = mb_y << 4;
+ int width = 16 * s->mb_width, height = 16 * s->mb_height;
+ ThreadFrame *ref = &s->framep[mb->ref_frame]->tf;
+ VP56mv *bmv = mb->bmv;
+
+ switch (mb->partitioning) {
+ case VP8_SPLITMVMODE_NONE:
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 0, 0, 16, 16, width, height, &mb->mv);
+ break;
+ case VP8_SPLITMVMODE_4x4: {
+ int x, y;
+ VP56mv uvmv;
+
+ /* Y */
+ for (y = 0; y < 4; y++) {
+ for (x = 0; x < 4; x++) {
+ vp8_mc_luma(s, td, dst[0] + 4 * y * s->linesize + x * 4,
+ ref, &bmv[4 * y + x],
+ 4 * x + x_off, 4 * y + y_off, 4, 4,
+ width, height, s->linesize,
+ s->put_pixels_tab[2]);
+ }
+ }
+
+ /* U/V */
+ x_off >>= 1;
+ y_off >>= 1;
+ width >>= 1;
+ height >>= 1;
+ for (y = 0; y < 2; y++) {
+ for (x = 0; x < 2; x++) {
+ uvmv.x = mb->bmv[2 * y * 4 + 2 * x ].x +
+ mb->bmv[2 * y * 4 + 2 * x + 1].x +
+ mb->bmv[(2 * y + 1) * 4 + 2 * x ].x +
+ mb->bmv[(2 * y + 1) * 4 + 2 * x + 1].x;
+ uvmv.y = mb->bmv[2 * y * 4 + 2 * x ].y +
+ mb->bmv[2 * y * 4 + 2 * x + 1].y +
+ mb->bmv[(2 * y + 1) * 4 + 2 * x ].y +
+ mb->bmv[(2 * y + 1) * 4 + 2 * x + 1].y;
+ uvmv.x = (uvmv.x + 2 + FF_SIGNBIT(uvmv.x)) >> 2;
+ uvmv.y = (uvmv.y + 2 + FF_SIGNBIT(uvmv.y)) >> 2;
+ if (s->profile == 3) {
+ uvmv.x &= ~7;
+ uvmv.y &= ~7;
+ }
+ vp8_mc_chroma(s, td, dst[1] + 4 * y * s->uvlinesize + x * 4,
+ dst[2] + 4 * y * s->uvlinesize + x * 4, ref,
+ &uvmv, 4 * x + x_off, 4 * y + y_off, 4, 4,
+ width, height, s->uvlinesize,
+ s->put_pixels_tab[2]);
+ }
+ }
+ break;
+ }
+ case VP8_SPLITMVMODE_16x8:
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 0, 0, 16, 8, width, height, &bmv[0]);
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 0, 8, 16, 8, width, height, &bmv[1]);
+ break;
+ case VP8_SPLITMVMODE_8x16:
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 0, 0, 8, 16, width, height, &bmv[0]);
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 8, 0, 8, 16, width, height, &bmv[1]);
+ break;
+ case VP8_SPLITMVMODE_8x8:
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 0, 0, 8, 8, width, height, &bmv[0]);
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 8, 0, 8, 8, width, height, &bmv[1]);
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 0, 8, 8, 8, width, height, &bmv[2]);
+ vp8_mc_part(s, td, dst, ref, x_off, y_off,
+ 8, 8, 8, 8, width, height, &bmv[3]);
+ break;
+ }
+}
+
+static av_always_inline
+void idct_mb(VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], VP8Macroblock *mb)
+{
+ int x, y, ch;
+
+ if (mb->mode != MODE_I4x4) {
+ uint8_t *y_dst = dst[0];
+ for (y = 0; y < 4; y++) {
+ uint32_t nnz4 = AV_RL32(td->non_zero_count_cache[y]);
+ if (nnz4) {
+ if (nnz4 & ~0x01010101) {
+ for (x = 0; x < 4; x++) {
+ if ((uint8_t) nnz4 == 1)
+ s->vp8dsp.vp8_idct_dc_add(y_dst + 4 * x,
+ td->block[y][x],
+ s->linesize);
+ else if ((uint8_t) nnz4 > 1)
+ s->vp8dsp.vp8_idct_add(y_dst + 4 * x,
+ td->block[y][x],
+ s->linesize);
+ nnz4 >>= 8;
+ if (!nnz4)
+ break;
+ }
+ } else {
+ s->vp8dsp.vp8_idct_dc_add4y(y_dst, td->block[y], s->linesize);
+ }
+ }
+ y_dst += 4 * s->linesize;
+ }
+ }
+
+ for (ch = 0; ch < 2; ch++) {
+ uint32_t nnz4 = AV_RL32(td->non_zero_count_cache[4 + ch]);
+ if (nnz4) {
+ uint8_t *ch_dst = dst[1 + ch];
+ if (nnz4 & ~0x01010101) {
+ for (y = 0; y < 2; y++) {
+ for (x = 0; x < 2; x++) {
+ if ((uint8_t) nnz4 == 1)
+ s->vp8dsp.vp8_idct_dc_add(ch_dst + 4 * x,
+ td->block[4 + ch][(y << 1) + x],
+ s->uvlinesize);
+ else if ((uint8_t) nnz4 > 1)
+ s->vp8dsp.vp8_idct_add(ch_dst + 4 * x,
+ td->block[4 + ch][(y << 1) + x],
+ s->uvlinesize);
+ nnz4 >>= 8;
+ if (!nnz4)
+ goto chroma_idct_end;
+ }
+ ch_dst += 4 * s->uvlinesize;
+ }
+ } else {
+ s->vp8dsp.vp8_idct_dc_add4uv(ch_dst, td->block[4 + ch], s->uvlinesize);
+ }
+ }
+chroma_idct_end:
+ ;
+ }
+}
+
+static av_always_inline
+void filter_level_for_mb(VP8Context *s, VP8Macroblock *mb,
+ VP8FilterStrength *f, int is_vp7)
+{
+ int interior_limit, filter_level;
+
+ if (s->segmentation.enabled) {
+ filter_level = s->segmentation.filter_level[mb->segment];
+ if (!s->segmentation.absolute_vals)
+ filter_level += s->filter.level;
+ } else
+ filter_level = s->filter.level;
+
+ if (s->lf_delta.enabled) {
+ filter_level += s->lf_delta.ref[mb->ref_frame];
+ filter_level += s->lf_delta.mode[mb->mode];
+ }
+
+ filter_level = av_clip_uintp2(filter_level, 6);
+
+ interior_limit = filter_level;
+ if (s->filter.sharpness) {
+ interior_limit >>= (s->filter.sharpness + 3) >> 2;
+ interior_limit = FFMIN(interior_limit, 9 - s->filter.sharpness);
+ }
+ interior_limit = FFMAX(interior_limit, 1);
+
+ f->filter_level = filter_level;
+ f->inner_limit = interior_limit;
+ f->inner_filter = is_vp7 || !mb->skip || mb->mode == MODE_I4x4 ||
+ mb->mode == VP8_MVMODE_SPLIT;
+}
+
+static av_always_inline
+void filter_mb(VP8Context *s, uint8_t *dst[3], VP8FilterStrength *f,
+ int mb_x, int mb_y, int is_vp7)
+{
+ int mbedge_lim, bedge_lim_y, bedge_lim_uv, hev_thresh;
+ int filter_level = f->filter_level;
+ int inner_limit = f->inner_limit;
+ int inner_filter = f->inner_filter;
+ int linesize = s->linesize;
+ int uvlinesize = s->uvlinesize;
+ static const uint8_t hev_thresh_lut[2][64] = {
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+ 3, 3, 3, 3 },
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2 }
+ };
+
+ if (!filter_level)
+ return;
+
+ if (is_vp7) {
+ bedge_lim_y = filter_level;
+ bedge_lim_uv = filter_level * 2;
+ mbedge_lim = filter_level + 2;
+ } else {
+ bedge_lim_y =
+ bedge_lim_uv = filter_level * 2 + inner_limit;
+ mbedge_lim = bedge_lim_y + 4;
+ }
+
+ hev_thresh = hev_thresh_lut[s->keyframe][filter_level];
+
+ if (mb_x) {
+ s->vp8dsp.vp8_h_loop_filter16y(dst[0], linesize,
+ mbedge_lim, inner_limit, hev_thresh);
+ s->vp8dsp.vp8_h_loop_filter8uv(dst[1], dst[2], uvlinesize,
+ mbedge_lim, inner_limit, hev_thresh);
+ }
+
+#define H_LOOP_FILTER_16Y_INNER(cond) \
+ if (cond && inner_filter) { \
+ s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 4, linesize, \
+ bedge_lim_y, inner_limit, \
+ hev_thresh); \
+ s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 8, linesize, \
+ bedge_lim_y, inner_limit, \
+ hev_thresh); \
+ s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 12, linesize, \
+ bedge_lim_y, inner_limit, \
+ hev_thresh); \
+ s->vp8dsp.vp8_h_loop_filter8uv_inner(dst[1] + 4, dst[2] + 4, \
+ uvlinesize, bedge_lim_uv, \
+ inner_limit, hev_thresh); \
+ }
+
+ H_LOOP_FILTER_16Y_INNER(!is_vp7)
+
+ if (mb_y) {
+ s->vp8dsp.vp8_v_loop_filter16y(dst[0], linesize,
+ mbedge_lim, inner_limit, hev_thresh);
+ s->vp8dsp.vp8_v_loop_filter8uv(dst[1], dst[2], uvlinesize,
+ mbedge_lim, inner_limit, hev_thresh);
+ }
+
+ if (inner_filter) {
+ s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0] + 4 * linesize,
+ linesize, bedge_lim_y,
+ inner_limit, hev_thresh);
+ s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0] + 8 * linesize,
+ linesize, bedge_lim_y,
+ inner_limit, hev_thresh);
+ s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0] + 12 * linesize,
+ linesize, bedge_lim_y,
+ inner_limit, hev_thresh);
+ s->vp8dsp.vp8_v_loop_filter8uv_inner(dst[1] + 4 * uvlinesize,
+ dst[2] + 4 * uvlinesize,
+ uvlinesize, bedge_lim_uv,
+ inner_limit, hev_thresh);
+ }
+
+ H_LOOP_FILTER_16Y_INNER(is_vp7)
+}
+
+static av_always_inline
+void filter_mb_simple(VP8Context *s, uint8_t *dst, VP8FilterStrength *f,
+ int mb_x, int mb_y)
+{
+ int mbedge_lim, bedge_lim;
+ int filter_level = f->filter_level;
+ int inner_limit = f->inner_limit;
+ int inner_filter = f->inner_filter;
+ int linesize = s->linesize;
+
+ if (!filter_level)
+ return;
+
+ bedge_lim = 2 * filter_level + inner_limit;
+ mbedge_lim = bedge_lim + 4;
+
+ if (mb_x)
+ s->vp8dsp.vp8_h_loop_filter_simple(dst, linesize, mbedge_lim);
+ if (inner_filter) {
+ s->vp8dsp.vp8_h_loop_filter_simple(dst + 4, linesize, bedge_lim);
+ s->vp8dsp.vp8_h_loop_filter_simple(dst + 8, linesize, bedge_lim);
+ s->vp8dsp.vp8_h_loop_filter_simple(dst + 12, linesize, bedge_lim);
+ }
+
+ if (mb_y)
+ s->vp8dsp.vp8_v_loop_filter_simple(dst, linesize, mbedge_lim);
+ if (inner_filter) {
+ s->vp8dsp.vp8_v_loop_filter_simple(dst + 4 * linesize, linesize, bedge_lim);
+ s->vp8dsp.vp8_v_loop_filter_simple(dst + 8 * linesize, linesize, bedge_lim);
+ s->vp8dsp.vp8_v_loop_filter_simple(dst + 12 * linesize, linesize, bedge_lim);
+ }
+}
+
+#define MARGIN (16 << 2)
+static av_always_inline
+void vp78_decode_mv_mb_modes(AVCodecContext *avctx, VP8Frame *curframe,
+ VP8Frame *prev_frame, int is_vp7)
+{
+ VP8Context *s = avctx->priv_data;
+ int mb_x, mb_y;
+
+ s->mv_min.y = -MARGIN;
+ s->mv_max.y = ((s->mb_height - 1) << 6) + MARGIN;
+ for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
+ VP8Macroblock *mb = s->macroblocks_base +
+ ((s->mb_width + 1) * (mb_y + 1) + 1);
+ int mb_xy = mb_y * s->mb_width;
+
+ AV_WN32A(s->intra4x4_pred_mode_left, DC_PRED * 0x01010101);
+
+ s->mv_min.x = -MARGIN;
+ s->mv_max.x = ((s->mb_width - 1) << 6) + MARGIN;
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) {
+ if (mb_y == 0)
+ AV_WN32A((mb - s->mb_width - 1)->intra4x4_pred_mode_top,
+ DC_PRED * 0x01010101);
+ decode_mb_mode(s, mb, mb_x, mb_y, curframe->seg_map->data + mb_xy,
+ prev_frame && prev_frame->seg_map ?
+ prev_frame->seg_map->data + mb_xy : NULL, 1, is_vp7);
+ s->mv_min.x -= 64;
+ s->mv_max.x -= 64;
+ }
+ s->mv_min.y -= 64;
+ s->mv_max.y -= 64;
+ }
+}
+
+static void vp7_decode_mv_mb_modes(AVCodecContext *avctx, VP8Frame *cur_frame,
+ VP8Frame *prev_frame)
+{
+ vp78_decode_mv_mb_modes(avctx, cur_frame, prev_frame, IS_VP7);
+}
+
+static void vp8_decode_mv_mb_modes(AVCodecContext *avctx, VP8Frame *cur_frame,
+ VP8Frame *prev_frame)
+{
+ vp78_decode_mv_mb_modes(avctx, cur_frame, prev_frame, IS_VP8);
+}
+
+#if HAVE_THREADS
+#define check_thread_pos(td, otd, mb_x_check, mb_y_check) \
+ do { \
+ int tmp = (mb_y_check << 16) | (mb_x_check & 0xFFFF); \
+ if (otd->thread_mb_pos < tmp) { \
+ pthread_mutex_lock(&otd->lock); \
+ td->wait_mb_pos = tmp; \
+ do { \
+ if (otd->thread_mb_pos >= tmp) \
+ break; \
+ pthread_cond_wait(&otd->cond, &otd->lock); \
+ } while (1); \
+ td->wait_mb_pos = INT_MAX; \
+ pthread_mutex_unlock(&otd->lock); \
+ } \
+ } while (0)
+
+#define update_pos(td, mb_y, mb_x) \
+ do { \
+ int pos = (mb_y << 16) | (mb_x & 0xFFFF); \
+ int sliced_threading = (avctx->active_thread_type == FF_THREAD_SLICE) && \
+ (num_jobs > 1); \
+ int is_null = !next_td || !prev_td; \
+ int pos_check = (is_null) ? 1 \
+ : (next_td != td && \
+ pos >= next_td->wait_mb_pos) || \
+ (prev_td != td && \
+ pos >= prev_td->wait_mb_pos); \
+ td->thread_mb_pos = pos; \
+ if (sliced_threading && pos_check) { \
+ pthread_mutex_lock(&td->lock); \
+ pthread_cond_broadcast(&td->cond); \
+ pthread_mutex_unlock(&td->lock); \
+ } \
+ } while (0)
+#else
+#define check_thread_pos(td, otd, mb_x_check, mb_y_check) while(0)
+#define update_pos(td, mb_y, mb_x) while(0)
+#endif
+
+static av_always_inline void decode_mb_row_no_filter(AVCodecContext *avctx, void *tdata,
+ int jobnr, int threadnr, int is_vp7)
+{
+ VP8Context *s = avctx->priv_data;
+ VP8ThreadData *prev_td, *next_td, *td = &s->thread_data[threadnr];
+ int mb_y = td->thread_mb_pos >> 16;
+ int mb_x, mb_xy = mb_y * s->mb_width;
+ int num_jobs = s->num_jobs;
+ VP8Frame *curframe = s->curframe, *prev_frame = s->prev_frame;
+ VP56RangeCoder *c = &s->coeff_partition[mb_y & (s->num_coeff_partitions - 1)];
+ VP8Macroblock *mb;
+ uint8_t *dst[3] = {
+ curframe->tf.f->data[0] + 16 * mb_y * s->linesize,
+ curframe->tf.f->data[1] + 8 * mb_y * s->uvlinesize,
+ curframe->tf.f->data[2] + 8 * mb_y * s->uvlinesize
+ };
+ if (mb_y == 0)
+ prev_td = td;
+ else
+ prev_td = &s->thread_data[(jobnr + num_jobs - 1) % num_jobs];
+ if (mb_y == s->mb_height - 1)
+ next_td = td;
+ else
+ next_td = &s->thread_data[(jobnr + 1) % num_jobs];
+ if (s->mb_layout == 1)
+ mb = s->macroblocks_base + ((s->mb_width + 1) * (mb_y + 1) + 1);
+ else {
+ // Make sure the previous frame has read its segmentation map,
+ // if we re-use the same map.
+ if (prev_frame && s->segmentation.enabled &&
+ !s->segmentation.update_map)
+ ff_thread_await_progress(&prev_frame->tf, mb_y, 0);
+ mb = s->macroblocks + (s->mb_height - mb_y - 1) * 2;
+ memset(mb - 1, 0, sizeof(*mb)); // zero left macroblock
+ AV_WN32A(s->intra4x4_pred_mode_left, DC_PRED * 0x01010101);
+ }
+
+ if (!is_vp7 || mb_y == 0)
+ memset(td->left_nnz, 0, sizeof(td->left_nnz));
+
+ s->mv_min.x = -MARGIN;
+ s->mv_max.x = ((s->mb_width - 1) << 6) + MARGIN;
+
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) {
+ // Wait for previous thread to read mb_x+2, and reach mb_y-1.
+ if (prev_td != td) {
+ if (threadnr != 0) {
+ check_thread_pos(td, prev_td,
+ mb_x + (is_vp7 ? 2 : 1),
+ mb_y - (is_vp7 ? 2 : 1));
+ } else {
+ check_thread_pos(td, prev_td,
+ mb_x + (is_vp7 ? 2 : 1) + s->mb_width + 3,
+ mb_y - (is_vp7 ? 2 : 1));
+ }
+ }
+
+ s->vdsp.prefetch(dst[0] + (mb_x & 3) * 4 * s->linesize + 64,
+ s->linesize, 4);
+ s->vdsp.prefetch(dst[1] + (mb_x & 7) * s->uvlinesize + 64,
+ dst[2] - dst[1], 2);
+
+ if (!s->mb_layout)
+ decode_mb_mode(s, mb, mb_x, mb_y, curframe->seg_map->data + mb_xy,
+ prev_frame && prev_frame->seg_map ?
+ prev_frame->seg_map->data + mb_xy : NULL, 0, is_vp7);
+
+ prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_PREVIOUS);
+
+ if (!mb->skip)
+ decode_mb_coeffs(s, td, c, mb, s->top_nnz[mb_x], td->left_nnz, is_vp7);
+
+ if (mb->mode <= MODE_I4x4)
+ intra_predict(s, td, dst, mb, mb_x, mb_y, is_vp7);
+ else
+ inter_predict(s, td, dst, mb, mb_x, mb_y);
+
+ prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_GOLDEN);
+
+ if (!mb->skip) {
+ idct_mb(s, td, dst, mb);
+ } else {
+ AV_ZERO64(td->left_nnz);
+ AV_WN64(s->top_nnz[mb_x], 0); // array of 9, so unaligned
+
+ /* Reset DC block predictors if they would exist
+ * if the mb had coefficients */
+ if (mb->mode != MODE_I4x4 && mb->mode != VP8_MVMODE_SPLIT) {
+ td->left_nnz[8] = 0;
+ s->top_nnz[mb_x][8] = 0;
+ }
+ }
+
+ if (s->deblock_filter)
+ filter_level_for_mb(s, mb, &td->filter_strength[mb_x], is_vp7);
+
+ if (s->deblock_filter && num_jobs != 1 && threadnr == num_jobs - 1) {
+ if (s->filter.simple)
+ backup_mb_border(s->top_border[mb_x + 1], dst[0],
+ NULL, NULL, s->linesize, 0, 1);
+ else
+ backup_mb_border(s->top_border[mb_x + 1], dst[0],
+ dst[1], dst[2], s->linesize, s->uvlinesize, 0);
+ }
+
+ prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_GOLDEN2);
+
+ dst[0] += 16;
+ dst[1] += 8;
+ dst[2] += 8;
+ s->mv_min.x -= 64;
+ s->mv_max.x -= 64;
+
+ if (mb_x == s->mb_width + 1) {
+ update_pos(td, mb_y, s->mb_width + 3);
+ } else {
+ update_pos(td, mb_y, mb_x);
+ }
+ }
+}
+
+static void vp7_decode_mb_row_no_filter(AVCodecContext *avctx, void *tdata,
+ int jobnr, int threadnr)
+{
+ decode_mb_row_no_filter(avctx, tdata, jobnr, threadnr, 1);
+}
+
+static void vp8_decode_mb_row_no_filter(AVCodecContext *avctx, void *tdata,
+ int jobnr, int threadnr)
+{
+ decode_mb_row_no_filter(avctx, tdata, jobnr, threadnr, 0);
+}
+
+static av_always_inline void filter_mb_row(AVCodecContext *avctx, void *tdata,
+ int jobnr, int threadnr, int is_vp7)
+{
+ VP8Context *s = avctx->priv_data;
+ VP8ThreadData *td = &s->thread_data[threadnr];
+ int mb_x, mb_y = td->thread_mb_pos >> 16, num_jobs = s->num_jobs;
+ AVFrame *curframe = s->curframe->tf.f;
+ VP8Macroblock *mb;
+ VP8ThreadData *prev_td, *next_td;
+ uint8_t *dst[3] = {
+ curframe->data[0] + 16 * mb_y * s->linesize,
+ curframe->data[1] + 8 * mb_y * s->uvlinesize,
+ curframe->data[2] + 8 * mb_y * s->uvlinesize
+ };
+
+ if (s->mb_layout == 1)
+ mb = s->macroblocks_base + ((s->mb_width + 1) * (mb_y + 1) + 1);
+ else
+ mb = s->macroblocks + (s->mb_height - mb_y - 1) * 2;
+
+ if (mb_y == 0)
+ prev_td = td;
+ else
+ prev_td = &s->thread_data[(jobnr + num_jobs - 1) % num_jobs];
+ if (mb_y == s->mb_height - 1)
+ next_td = td;
+ else
+ next_td = &s->thread_data[(jobnr + 1) % num_jobs];
+
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb++) {
+ VP8FilterStrength *f = &td->filter_strength[mb_x];
+ if (prev_td != td)
+ check_thread_pos(td, prev_td,
+ (mb_x + 1) + (s->mb_width + 3), mb_y - 1);
+ if (next_td != td)
+ if (next_td != &s->thread_data[0])
+ check_thread_pos(td, next_td, mb_x + 1, mb_y + 1);
+
+ if (num_jobs == 1) {
+ if (s->filter.simple)
+ backup_mb_border(s->top_border[mb_x + 1], dst[0],
+ NULL, NULL, s->linesize, 0, 1);
+ else
+ backup_mb_border(s->top_border[mb_x + 1], dst[0],
+ dst[1], dst[2], s->linesize, s->uvlinesize, 0);
+ }
+
+ if (s->filter.simple)
+ filter_mb_simple(s, dst[0], f, mb_x, mb_y);
+ else
+ filter_mb(s, dst, f, mb_x, mb_y, is_vp7);
+ dst[0] += 16;
+ dst[1] += 8;
+ dst[2] += 8;
+
+ update_pos(td, mb_y, (s->mb_width + 3) + mb_x);
+ }
+}
+
+static void vp7_filter_mb_row(AVCodecContext *avctx, void *tdata,
+ int jobnr, int threadnr)
+{
+ filter_mb_row(avctx, tdata, jobnr, threadnr, 1);
+}
+
+static void vp8_filter_mb_row(AVCodecContext *avctx, void *tdata,
+ int jobnr, int threadnr)
+{
+ filter_mb_row(avctx, tdata, jobnr, threadnr, 0);
+}
+
+static av_always_inline
+int vp78_decode_mb_row_sliced(AVCodecContext *avctx, void *tdata, int jobnr,
+ int threadnr, int is_vp7)
+{
+ VP8Context *s = avctx->priv_data;
+ VP8ThreadData *td = &s->thread_data[jobnr];
+ VP8ThreadData *next_td = NULL, *prev_td = NULL;
+ VP8Frame *curframe = s->curframe;
+ int mb_y, num_jobs = s->num_jobs;
+
+ td->thread_nr = threadnr;
+ for (mb_y = jobnr; mb_y < s->mb_height; mb_y += num_jobs) {
+ if (mb_y >= s->mb_height)
+ break;
+ td->thread_mb_pos = mb_y << 16;
+ s->decode_mb_row_no_filter(avctx, tdata, jobnr, threadnr);
+ if (s->deblock_filter)
+ s->filter_mb_row(avctx, tdata, jobnr, threadnr);
+ update_pos(td, mb_y, INT_MAX & 0xFFFF);
+
+ s->mv_min.y -= 64;
+ s->mv_max.y -= 64;
+
+ if (avctx->active_thread_type == FF_THREAD_FRAME)
+ ff_thread_report_progress(&curframe->tf, mb_y, 0);
+ }
+
+ return 0;
+}
+
+static int vp7_decode_mb_row_sliced(AVCodecContext *avctx, void *tdata,
+ int jobnr, int threadnr)
+{
+ return vp78_decode_mb_row_sliced(avctx, tdata, jobnr, threadnr, IS_VP7);
+}
+
+static int vp8_decode_mb_row_sliced(AVCodecContext *avctx, void *tdata,
+ int jobnr, int threadnr)
+{
+ return vp78_decode_mb_row_sliced(avctx, tdata, jobnr, threadnr, IS_VP8);
+}
+
+
+static av_always_inline
+int vp78_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+ AVPacket *avpkt, int is_vp7)
+{
+ VP8Context *s = avctx->priv_data;
+ int ret, i, referenced, num_jobs;
+ enum AVDiscard skip_thresh;
+ VP8Frame *av_uninit(curframe), *prev_frame;
+
+ if (is_vp7)
+ ret = vp7_decode_frame_header(s, avpkt->data, avpkt->size);
+ else
+ ret = vp8_decode_frame_header(s, avpkt->data, avpkt->size);
+
+ if (ret < 0)
+ goto err;
+
+ prev_frame = s->framep[VP56_FRAME_CURRENT];
+
+ referenced = s->update_last || s->update_golden == VP56_FRAME_CURRENT ||
+ s->update_altref == VP56_FRAME_CURRENT;
+
+ skip_thresh = !referenced ? AVDISCARD_NONREF
+ : !s->keyframe ? AVDISCARD_NONKEY
+ : AVDISCARD_ALL;
+
+ if (avctx->skip_frame >= skip_thresh) {
+ s->invisible = 1;
+ memcpy(&s->next_framep[0], &s->framep[0], sizeof(s->framep[0]) * 4);
+ goto skip_decode;
+ }
+ s->deblock_filter = s->filter.level && avctx->skip_loop_filter < skip_thresh;
+
+ // release no longer referenced frames
+ for (i = 0; i < 5; i++)
+ if (s->frames[i].tf.f->data[0] &&
+ &s->frames[i] != prev_frame &&
+ &s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] &&
+ &s->frames[i] != s->framep[VP56_FRAME_GOLDEN] &&
+ &s->frames[i] != s->framep[VP56_FRAME_GOLDEN2])
+ vp8_release_frame(s, &s->frames[i]);
+
+ curframe = s->framep[VP56_FRAME_CURRENT] = vp8_find_free_buffer(s);
+
+ if (!s->colorspace)
+ avctx->colorspace = AVCOL_SPC_BT470BG;
+ if (s->fullrange)
+ avctx->color_range = AVCOL_RANGE_JPEG;
+ else
+ avctx->color_range = AVCOL_RANGE_MPEG;
+
+ /* Given that arithmetic probabilities are updated every frame, it's quite
+ * likely that the values we have on a random interframe are complete
+ * junk if we didn't start decode on a keyframe. So just don't display
+ * anything rather than junk. */
+ if (!s->keyframe && (!s->framep[VP56_FRAME_PREVIOUS] ||
+ !s->framep[VP56_FRAME_GOLDEN] ||
+ !s->framep[VP56_FRAME_GOLDEN2])) {
+ av_log(avctx, AV_LOG_WARNING,
+ "Discarding interframe without a prior keyframe!\n");
+ ret = AVERROR_INVALIDDATA;
+ goto err;
+ }
+
+ curframe->tf.f->key_frame = s->keyframe;
+ curframe->tf.f->pict_type = s->keyframe ? AV_PICTURE_TYPE_I
+ : AV_PICTURE_TYPE_P;
+ if ((ret = vp8_alloc_frame(s, curframe, referenced)) < 0)
+ goto err;
+
+ // check if golden and altref are swapped
+ if (s->update_altref != VP56_FRAME_NONE)
+ s->next_framep[VP56_FRAME_GOLDEN2] = s->framep[s->update_altref];
+ else
+ s->next_framep[VP56_FRAME_GOLDEN2] = s->framep[VP56_FRAME_GOLDEN2];
+
+ if (s->update_golden != VP56_FRAME_NONE)
+ s->next_framep[VP56_FRAME_GOLDEN] = s->framep[s->update_golden];
+ else
+ s->next_framep[VP56_FRAME_GOLDEN] = s->framep[VP56_FRAME_GOLDEN];
+
+ if (s->update_last)
+ s->next_framep[VP56_FRAME_PREVIOUS] = curframe;
+ else
+ s->next_framep[VP56_FRAME_PREVIOUS] = s->framep[VP56_FRAME_PREVIOUS];
+
+ s->next_framep[VP56_FRAME_CURRENT] = curframe;
+
+ if (avctx->codec->update_thread_context)
+ ff_thread_finish_setup(avctx);
+
+ s->linesize = curframe->tf.f->linesize[0];
+ s->uvlinesize = curframe->tf.f->linesize[1];
+
+ memset(s->top_nnz, 0, s->mb_width * sizeof(*s->top_nnz));
+ /* Zero macroblock structures for top/top-left prediction
+ * from outside the frame. */
+ if (!s->mb_layout)
+ memset(s->macroblocks + s->mb_height * 2 - 1, 0,
+ (s->mb_width + 1) * sizeof(*s->macroblocks));
+ if (!s->mb_layout && s->keyframe)
+ memset(s->intra4x4_pred_mode_top, DC_PRED, s->mb_width * 4);
+
+ memset(s->ref_count, 0, sizeof(s->ref_count));
+
+ if (s->mb_layout == 1) {
+ // Make sure the previous frame has read its segmentation map,
+ // if we re-use the same map.
+ if (prev_frame && s->segmentation.enabled &&
+ !s->segmentation.update_map)
+ ff_thread_await_progress(&prev_frame->tf, 1, 0);
+ if (is_vp7)
+ vp7_decode_mv_mb_modes(avctx, curframe, prev_frame);
+ else
+ vp8_decode_mv_mb_modes(avctx, curframe, prev_frame);
+ }
+
+ if (avctx->active_thread_type == FF_THREAD_FRAME)
+ num_jobs = 1;
+ else
+ num_jobs = FFMIN(s->num_coeff_partitions, avctx->thread_count);
+ s->num_jobs = num_jobs;
+ s->curframe = curframe;
+ s->prev_frame = prev_frame;
+ s->mv_min.y = -MARGIN;
+ s->mv_max.y = ((s->mb_height - 1) << 6) + MARGIN;
+ for (i = 0; i < MAX_THREADS; i++) {
+ s->thread_data[i].thread_mb_pos = 0;
+ s->thread_data[i].wait_mb_pos = INT_MAX;
+ }
+ if (is_vp7)
+ avctx->execute2(avctx, vp7_decode_mb_row_sliced, s->thread_data, NULL,
+ num_jobs);
+ else
+ avctx->execute2(avctx, vp8_decode_mb_row_sliced, s->thread_data, NULL,
+ num_jobs);
+
+ ff_thread_report_progress(&curframe->tf, INT_MAX, 0);
+ memcpy(&s->framep[0], &s->next_framep[0], sizeof(s->framep[0]) * 4);
+
+skip_decode:
+ // if future frames don't use the updated probabilities,
+ // reset them to the values we saved
+ if (!s->update_probabilities)
+ s->prob[0] = s->prob[1];
+
+ if (!s->invisible) {
+ if ((ret = av_frame_ref(data, curframe->tf.f)) < 0)
+ return ret;
+ *got_frame = 1;
+ }
+
+ return avpkt->size;
+err:
+ memcpy(&s->next_framep[0], &s->framep[0], sizeof(s->framep[0]) * 4);
+ return ret;
+}
+
+int ff_vp8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+ AVPacket *avpkt)
+{
+ return vp78_decode_frame(avctx, data, got_frame, avpkt, IS_VP8);
+}
+
+#if CONFIG_VP7_DECODER
+static int vp7_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+ AVPacket *avpkt)
+{
+ return vp78_decode_frame(avctx, data, got_frame, avpkt, IS_VP7);
+}
+#endif /* CONFIG_VP7_DECODER */
+
+av_cold int ff_vp8_decode_free(AVCodecContext *avctx)
+{
+ VP8Context *s = avctx->priv_data;
+ int i;
+
+ if (!s)
+ return 0;
+
+ vp8_decode_flush_impl(avctx, 1);
+ for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++)
+ av_frame_free(&s->frames[i].tf.f);
+
+ return 0;
+}
+
+static av_cold int vp8_init_frames(VP8Context *s)
+{
+ int i;
+ for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) {
+ s->frames[i].tf.f = av_frame_alloc();
+ if (!s->frames[i].tf.f)
+ return AVERROR(ENOMEM);
+ }
+ return 0;
+}
+
+static av_always_inline
+int vp78_decode_init(AVCodecContext *avctx, int is_vp7)
+{
+ VP8Context *s = avctx->priv_data;
+ int ret;
+
+ s->avctx = avctx;
+ s->vp7 = avctx->codec->id == AV_CODEC_ID_VP7;
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+ avctx->internal->allocate_progress = 1;
+
+ ff_videodsp_init(&s->vdsp, 8);
+
+ ff_vp78dsp_init(&s->vp8dsp);
+ if (CONFIG_VP7_DECODER && is_vp7) {
+ ff_h264_pred_init(&s->hpc, AV_CODEC_ID_VP7, 8, 1);
+ ff_vp7dsp_init(&s->vp8dsp);
+ s->decode_mb_row_no_filter = vp7_decode_mb_row_no_filter;
+ s->filter_mb_row = vp7_filter_mb_row;
+ } else if (CONFIG_VP8_DECODER && !is_vp7) {
+ ff_h264_pred_init(&s->hpc, AV_CODEC_ID_VP8, 8, 1);
+ ff_vp8dsp_init(&s->vp8dsp);
+ s->decode_mb_row_no_filter = vp8_decode_mb_row_no_filter;
+ s->filter_mb_row = vp8_filter_mb_row;
+ }
+
+ /* does not change for VP8 */
+ memcpy(s->prob[0].scan, ff_zigzag_scan, sizeof(s->prob[0].scan));
+
+ if ((ret = vp8_init_frames(s)) < 0) {
+ ff_vp8_decode_free(avctx);
+ return ret;
+ }
+
+ return 0;
+}
+
+#if CONFIG_VP7_DECODER
+static int vp7_decode_init(AVCodecContext *avctx)
+{
+ return vp78_decode_init(avctx, IS_VP7);
+}
+#endif /* CONFIG_VP7_DECODER */
+
+av_cold int ff_vp8_decode_init(AVCodecContext *avctx)
+{
+ return vp78_decode_init(avctx, IS_VP8);
+}
+
+#if CONFIG_VP8_DECODER
+#if HAVE_THREADS
+static av_cold int vp8_decode_init_thread_copy(AVCodecContext *avctx)
+{
+ VP8Context *s = avctx->priv_data;
+ int ret;
+
+ s->avctx = avctx;
+
+ if ((ret = vp8_init_frames(s)) < 0) {
+ ff_vp8_decode_free(avctx);
+ return ret;
+ }
+
+ return 0;
+}
+
+#define REBASE(pic) ((pic) ? (pic) - &s_src->frames[0] + &s->frames[0] : NULL)
+
+static int vp8_decode_update_thread_context(AVCodecContext *dst,
+ const AVCodecContext *src)
+{
+ VP8Context *s = dst->priv_data, *s_src = src->priv_data;
+ int i;
+
+ if (s->macroblocks_base &&
+ (s_src->mb_width != s->mb_width || s_src->mb_height != s->mb_height)) {
+ free_buffers(s);
+ s->mb_width = s_src->mb_width;
+ s->mb_height = s_src->mb_height;
+ }
+
+ s->prob[0] = s_src->prob[!s_src->update_probabilities];
+ s->segmentation = s_src->segmentation;
+ s->lf_delta = s_src->lf_delta;
+ memcpy(s->sign_bias, s_src->sign_bias, sizeof(s->sign_bias));
+
+ for (i = 0; i < FF_ARRAY_ELEMS(s_src->frames); i++) {
+ if (s_src->frames[i].tf.f->data[0]) {
+ int ret = vp8_ref_frame(s, &s->frames[i], &s_src->frames[i]);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ s->framep[0] = REBASE(s_src->next_framep[0]);
+ s->framep[1] = REBASE(s_src->next_framep[1]);
+ s->framep[2] = REBASE(s_src->next_framep[2]);
+ s->framep[3] = REBASE(s_src->next_framep[3]);
+
+ return 0;
+}
+#endif /* HAVE_THREADS */
+#endif /* CONFIG_VP8_DECODER */
+
+#if CONFIG_VP7_DECODER
+AVCodec ff_vp7_decoder = {
+ .name = "vp7",
+ .long_name = NULL_IF_CONFIG_SMALL("On2 VP7"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_VP7,
+ .priv_data_size = sizeof(VP8Context),
+ .init = vp7_decode_init,
+ .close = ff_vp8_decode_free,
+ .decode = vp7_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
+ .flush = vp8_decode_flush,
+};
+#endif /* CONFIG_VP7_DECODER */
+
+#if CONFIG_VP8_DECODER
+AVCodec ff_vp8_decoder = {
+ .name = "vp8",
+ .long_name = NULL_IF_CONFIG_SMALL("On2 VP8"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_VP8,
+ .priv_data_size = sizeof(VP8Context),
+ .init = ff_vp8_decode_init,
+ .close = ff_vp8_decode_free,
+ .decode = ff_vp8_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
+ AV_CODEC_CAP_SLICE_THREADS,
+ .flush = vp8_decode_flush,
+ .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp8_decode_init_thread_copy),
+ .update_thread_context = ONLY_IF_THREADS_ENABLED(vp8_decode_update_thread_context),
+};
+#endif /* CONFIG_VP7_DECODER */