diff options
Diffstat (limited to 'media/libvpx/vp9/decoder/vp9_decoder.c')
| -rw-r--r-- | media/libvpx/vp9/decoder/vp9_decoder.c | 509 |
1 files changed, 509 insertions, 0 deletions
diff --git a/media/libvpx/vp9/decoder/vp9_decoder.c b/media/libvpx/vp9/decoder/vp9_decoder.c new file mode 100644 index 000000000..cc60c596f --- /dev/null +++ b/media/libvpx/vp9/decoder/vp9_decoder.c @@ -0,0 +1,509 @@ +/* + * Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include <assert.h> +#include <limits.h> +#include <stdio.h> + +#include "./vp9_rtcd.h" +#include "./vpx_dsp_rtcd.h" +#include "./vpx_scale_rtcd.h" + +#include "vpx_mem/vpx_mem.h" +#include "vpx_ports/vpx_once.h" +#include "vpx_ports/vpx_timer.h" +#include "vpx_scale/vpx_scale.h" + +#include "vp9/common/vp9_alloccommon.h" +#include "vp9/common/vp9_loopfilter.h" +#include "vp9/common/vp9_onyxc_int.h" +#if CONFIG_VP9_POSTPROC +#include "vp9/common/vp9_postproc.h" +#endif +#include "vp9/common/vp9_quant_common.h" +#include "vp9/common/vp9_reconintra.h" +#include "vp9/common/vp9_systemdependent.h" +#include "vp9/common/vp9_thread.h" + +#include "vp9/decoder/vp9_decodeframe.h" +#include "vp9/decoder/vp9_decoder.h" +#include "vp9/decoder/vp9_detokenize.h" + +static void initialize_dec(void) { + static volatile int init_done = 0; + + if (!init_done) { + vp9_rtcd(); + vpx_dsp_rtcd(); + vpx_scale_rtcd(); + vp9_init_intra_predictors(); + init_done = 1; + } +} + +static void vp9_dec_setup_mi(VP9_COMMON *cm) { + cm->mi = cm->mip + cm->mi_stride + 1; + cm->mi_grid_visible = cm->mi_grid_base + cm->mi_stride + 1; + memset(cm->mi_grid_base, 0, + cm->mi_stride * (cm->mi_rows + 1) * sizeof(*cm->mi_grid_base)); +} + +static int vp9_dec_alloc_mi(VP9_COMMON *cm, int mi_size) { + cm->mip = vpx_calloc(mi_size, sizeof(*cm->mip)); + if (!cm->mip) + return 1; + cm->mi_alloc_size = mi_size; + cm->mi_grid_base = (MODE_INFO **)vpx_calloc(mi_size, sizeof(MODE_INFO*)); + if (!cm->mi_grid_base) + return 1; + return 0; +} + +static void vp9_dec_free_mi(VP9_COMMON *cm) { + vpx_free(cm->mip); + cm->mip = NULL; + vpx_free(cm->mi_grid_base); + cm->mi_grid_base = NULL; +} + +VP9Decoder *vp9_decoder_create(BufferPool *const pool) { + VP9Decoder *volatile const pbi = vpx_memalign(32, sizeof(*pbi)); + VP9_COMMON *volatile const cm = pbi ? &pbi->common : NULL; + + if (!cm) + return NULL; + + vp9_zero(*pbi); + + if (setjmp(cm->error.jmp)) { + cm->error.setjmp = 0; + vp9_decoder_remove(pbi); + return NULL; + } + + cm->error.setjmp = 1; + + CHECK_MEM_ERROR(cm, cm->fc, + (FRAME_CONTEXT *)vpx_calloc(1, sizeof(*cm->fc))); + CHECK_MEM_ERROR(cm, cm->frame_contexts, + (FRAME_CONTEXT *)vpx_calloc(FRAME_CONTEXTS, + sizeof(*cm->frame_contexts))); + + pbi->need_resync = 1; + once(initialize_dec); + + // Initialize the references to not point to any frame buffers. + memset(&cm->ref_frame_map, -1, sizeof(cm->ref_frame_map)); + memset(&cm->next_ref_frame_map, -1, sizeof(cm->next_ref_frame_map)); + + cm->current_video_frame = 0; + pbi->ready_for_new_data = 1; + pbi->common.buffer_pool = pool; + + cm->bit_depth = VPX_BITS_8; + cm->dequant_bit_depth = VPX_BITS_8; + + cm->alloc_mi = vp9_dec_alloc_mi; + cm->free_mi = vp9_dec_free_mi; + cm->setup_mi = vp9_dec_setup_mi; + + vp9_loop_filter_init(cm); + + cm->error.setjmp = 0; + + vp9_get_worker_interface()->init(&pbi->lf_worker); + + return pbi; +} + +void vp9_decoder_remove(VP9Decoder *pbi) { + int i; + + vp9_get_worker_interface()->end(&pbi->lf_worker); + vpx_free(pbi->lf_worker.data1); + vpx_free(pbi->tile_data); + for (i = 0; i < pbi->num_tile_workers; ++i) { + VP9Worker *const worker = &pbi->tile_workers[i]; + vp9_get_worker_interface()->end(worker); + } + vpx_free(pbi->tile_worker_data); + vpx_free(pbi->tile_worker_info); + vpx_free(pbi->tile_workers); + + if (pbi->num_tile_workers > 0) { + vp9_loop_filter_dealloc(&pbi->lf_row_sync); + } + + vpx_free(pbi); +} + +static int equal_dimensions(const YV12_BUFFER_CONFIG *a, + const YV12_BUFFER_CONFIG *b) { + return a->y_height == b->y_height && a->y_width == b->y_width && + a->uv_height == b->uv_height && a->uv_width == b->uv_width; +} + +vpx_codec_err_t vp9_copy_reference_dec(VP9Decoder *pbi, + VP9_REFFRAME ref_frame_flag, + YV12_BUFFER_CONFIG *sd) { + VP9_COMMON *cm = &pbi->common; + + /* TODO(jkoleszar): The decoder doesn't have any real knowledge of what the + * encoder is using the frame buffers for. This is just a stub to keep the + * vpxenc --test-decode functionality working, and will be replaced in a + * later commit that adds VP9-specific controls for this functionality. + */ + if (ref_frame_flag == VP9_LAST_FLAG) { + const YV12_BUFFER_CONFIG *const cfg = get_ref_frame(cm, 0); + if (cfg == NULL) { + vpx_internal_error(&cm->error, VPX_CODEC_ERROR, + "No 'last' reference frame"); + return VPX_CODEC_ERROR; + } + if (!equal_dimensions(cfg, sd)) + vpx_internal_error(&cm->error, VPX_CODEC_ERROR, + "Incorrect buffer dimensions"); + else + vp8_yv12_copy_frame(cfg, sd); + } else { + vpx_internal_error(&cm->error, VPX_CODEC_ERROR, + "Invalid reference frame"); + } + + return cm->error.error_code; +} + + +vpx_codec_err_t vp9_set_reference_dec(VP9_COMMON *cm, + VP9_REFFRAME ref_frame_flag, + YV12_BUFFER_CONFIG *sd) { + RefBuffer *ref_buf = NULL; + RefCntBuffer *const frame_bufs = cm->buffer_pool->frame_bufs; + + // TODO(jkoleszar): The decoder doesn't have any real knowledge of what the + // encoder is using the frame buffers for. This is just a stub to keep the + // vpxenc --test-decode functionality working, and will be replaced in a + // later commit that adds VP9-specific controls for this functionality. + if (ref_frame_flag == VP9_LAST_FLAG) { + ref_buf = &cm->frame_refs[0]; + } else if (ref_frame_flag == VP9_GOLD_FLAG) { + ref_buf = &cm->frame_refs[1]; + } else if (ref_frame_flag == VP9_ALT_FLAG) { + ref_buf = &cm->frame_refs[2]; + } else { + vpx_internal_error(&cm->error, VPX_CODEC_ERROR, + "Invalid reference frame"); + return cm->error.error_code; + } + + if (!equal_dimensions(ref_buf->buf, sd)) { + vpx_internal_error(&cm->error, VPX_CODEC_ERROR, + "Incorrect buffer dimensions"); + } else { + int *ref_fb_ptr = &ref_buf->idx; + + // Find an empty frame buffer. + const int free_fb = get_free_fb(cm); + if (cm->new_fb_idx == INVALID_IDX) + return VPX_CODEC_MEM_ERROR; + + // Decrease ref_count since it will be increased again in + // ref_cnt_fb() below. + --frame_bufs[free_fb].ref_count; + + // Manage the reference counters and copy image. + ref_cnt_fb(frame_bufs, ref_fb_ptr, free_fb); + ref_buf->buf = &frame_bufs[*ref_fb_ptr].buf; + vp8_yv12_copy_frame(sd, ref_buf->buf); + } + + return cm->error.error_code; +} + +/* If any buffer updating is signaled it should be done here. */ +static void swap_frame_buffers(VP9Decoder *pbi) { + int ref_index = 0, mask; + VP9_COMMON *const cm = &pbi->common; + BufferPool *const pool = cm->buffer_pool; + RefCntBuffer *const frame_bufs = cm->buffer_pool->frame_bufs; + + lock_buffer_pool(pool); + for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) { + const int old_idx = cm->ref_frame_map[ref_index]; + // Current thread releases the holding of reference frame. + decrease_ref_count(old_idx, frame_bufs, pool); + + // Release the reference frame in reference map. + if ((mask & 1) && old_idx >= 0) { + decrease_ref_count(old_idx, frame_bufs, pool); + } + cm->ref_frame_map[ref_index] = cm->next_ref_frame_map[ref_index]; + ++ref_index; + } + + // Current thread releases the holding of reference frame. + for (; ref_index < REF_FRAMES && !cm->show_existing_frame; ++ref_index) { + const int old_idx = cm->ref_frame_map[ref_index]; + decrease_ref_count(old_idx, frame_bufs, pool); + cm->ref_frame_map[ref_index] = cm->next_ref_frame_map[ref_index]; + } + unlock_buffer_pool(pool); + pbi->hold_ref_buf = 0; + cm->frame_to_show = get_frame_new_buffer(cm); + + if (!pbi->frame_parallel_decode || !cm->show_frame) { + lock_buffer_pool(pool); + --frame_bufs[cm->new_fb_idx].ref_count; + unlock_buffer_pool(pool); + } + + // Invalidate these references until the next frame starts. + for (ref_index = 0; ref_index < 3; ref_index++) + cm->frame_refs[ref_index].idx = -1; +} + +int vp9_receive_compressed_data(VP9Decoder *pbi, + size_t size, const uint8_t **psource) { + VP9_COMMON *volatile const cm = &pbi->common; + BufferPool *volatile const pool = cm->buffer_pool; + RefCntBuffer *volatile const frame_bufs = cm->buffer_pool->frame_bufs; + const uint8_t *source = *psource; + int retcode = 0; + cm->error.error_code = VPX_CODEC_OK; + + if (size == 0) { + // This is used to signal that we are missing frames. + // We do not know if the missing frame(s) was supposed to update + // any of the reference buffers, but we act conservative and + // mark only the last buffer as corrupted. + // + // TODO(jkoleszar): Error concealment is undefined and non-normative + // at this point, but if it becomes so, [0] may not always be the correct + // thing to do here. + if (cm->frame_refs[0].idx > 0) { + assert(cm->frame_refs[0].buf != NULL); + cm->frame_refs[0].buf->corrupted = 1; + } + } + + pbi->ready_for_new_data = 0; + + // Check if the previous frame was a frame without any references to it. + // Release frame buffer if not decoding in frame parallel mode. + if (!pbi->frame_parallel_decode && cm->new_fb_idx >= 0 + && frame_bufs[cm->new_fb_idx].ref_count == 0) + pool->release_fb_cb(pool->cb_priv, + &frame_bufs[cm->new_fb_idx].raw_frame_buffer); + // Find a free frame buffer. Return error if can not find any. + cm->new_fb_idx = get_free_fb(cm); + if (cm->new_fb_idx == INVALID_IDX) + return VPX_CODEC_MEM_ERROR; + + // Assign a MV array to the frame buffer. + cm->cur_frame = &pool->frame_bufs[cm->new_fb_idx]; + + pbi->hold_ref_buf = 0; + if (pbi->frame_parallel_decode) { + VP9Worker *const worker = pbi->frame_worker_owner; + vp9_frameworker_lock_stats(worker); + frame_bufs[cm->new_fb_idx].frame_worker_owner = worker; + // Reset decoding progress. + pbi->cur_buf = &frame_bufs[cm->new_fb_idx]; + pbi->cur_buf->row = -1; + pbi->cur_buf->col = -1; + vp9_frameworker_unlock_stats(worker); + } else { + pbi->cur_buf = &frame_bufs[cm->new_fb_idx]; + } + + + if (setjmp(cm->error.jmp)) { + const VP9WorkerInterface *const winterface = vp9_get_worker_interface(); + int i; + + cm->error.setjmp = 0; + pbi->ready_for_new_data = 1; + + // Synchronize all threads immediately as a subsequent decode call may + // cause a resize invalidating some allocations. + winterface->sync(&pbi->lf_worker); + for (i = 0; i < pbi->num_tile_workers; ++i) { + winterface->sync(&pbi->tile_workers[i]); + } + + lock_buffer_pool(pool); + // Release all the reference buffers if worker thread is holding them. + if (pbi->hold_ref_buf == 1) { + int ref_index = 0, mask; + for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) { + const int old_idx = cm->ref_frame_map[ref_index]; + // Current thread releases the holding of reference frame. + decrease_ref_count(old_idx, frame_bufs, pool); + + // Release the reference frame in reference map. + if ((mask & 1) && old_idx >= 0) { + decrease_ref_count(old_idx, frame_bufs, pool); + } + ++ref_index; + } + + // Current thread releases the holding of reference frame. + for (; ref_index < REF_FRAMES && !cm->show_existing_frame; ++ref_index) { + const int old_idx = cm->ref_frame_map[ref_index]; + decrease_ref_count(old_idx, frame_bufs, pool); + } + pbi->hold_ref_buf = 0; + } + // Release current frame. + decrease_ref_count(cm->new_fb_idx, frame_bufs, pool); + unlock_buffer_pool(pool); + + vp9_clear_system_state(); + return -1; + } + + cm->error.setjmp = 1; + vp9_decode_frame(pbi, source, source + size, psource); + + swap_frame_buffers(pbi); + + vp9_clear_system_state(); + + if (!cm->show_existing_frame) { + cm->last_show_frame = cm->show_frame; + cm->prev_frame = cm->cur_frame; + if (cm->seg.enabled && !pbi->frame_parallel_decode) + vp9_swap_current_and_last_seg_map(cm); + } + + // Update progress in frame parallel decode. + if (pbi->frame_parallel_decode) { + // Need to lock the mutex here as another thread may + // be accessing this buffer. + VP9Worker *const worker = pbi->frame_worker_owner; + FrameWorkerData *const frame_worker_data = worker->data1; + vp9_frameworker_lock_stats(worker); + + if (cm->show_frame) { + cm->current_video_frame++; + } + frame_worker_data->frame_decoded = 1; + frame_worker_data->frame_context_ready = 1; + vp9_frameworker_signal_stats(worker); + vp9_frameworker_unlock_stats(worker); + } else { + cm->last_width = cm->width; + cm->last_height = cm->height; + if (cm->show_frame) { + cm->current_video_frame++; + } + } + + cm->error.setjmp = 0; + return retcode; +} + +int vp9_get_raw_frame(VP9Decoder *pbi, YV12_BUFFER_CONFIG *sd, + vp9_ppflags_t *flags) { + VP9_COMMON *const cm = &pbi->common; + int ret = -1; +#if !CONFIG_VP9_POSTPROC + (void)*flags; +#endif + + if (pbi->ready_for_new_data == 1) + return ret; + + pbi->ready_for_new_data = 1; + + /* no raw frame to show!!! */ + if (!cm->show_frame) + return ret; + + pbi->ready_for_new_data = 1; + +#if CONFIG_VP9_POSTPROC + if (!cm->show_existing_frame) { + ret = vp9_post_proc_frame(cm, sd, flags); + } else { + *sd = *cm->frame_to_show; + ret = 0; + } +#else + *sd = *cm->frame_to_show; + ret = 0; +#endif /*!CONFIG_POSTPROC*/ + vp9_clear_system_state(); + return ret; +} + +vpx_codec_err_t vp9_parse_superframe_index(const uint8_t *data, + size_t data_sz, + uint32_t sizes[8], int *count, + vpx_decrypt_cb decrypt_cb, + void *decrypt_state) { + // A chunk ending with a byte matching 0xc0 is an invalid chunk unless + // it is a super frame index. If the last byte of real video compression + // data is 0xc0 the encoder must add a 0 byte. If we have the marker but + // not the associated matching marker byte at the front of the index we have + // an invalid bitstream and need to return an error. + + uint8_t marker; + + assert(data_sz); + marker = read_marker(decrypt_cb, decrypt_state, data + data_sz - 1); + *count = 0; + + if ((marker & 0xe0) == 0xc0) { + const uint32_t frames = (marker & 0x7) + 1; + const uint32_t mag = ((marker >> 3) & 0x3) + 1; + const size_t index_sz = 2 + mag * frames; + + // This chunk is marked as having a superframe index but doesn't have + // enough data for it, thus it's an invalid superframe index. + if (data_sz < index_sz) + return VPX_CODEC_CORRUPT_FRAME; + + { + const uint8_t marker2 = read_marker(decrypt_cb, decrypt_state, + data + data_sz - index_sz); + + // This chunk is marked as having a superframe index but doesn't have + // the matching marker byte at the front of the index therefore it's an + // invalid chunk. + if (marker != marker2) + return VPX_CODEC_CORRUPT_FRAME; + } + + { + // Found a valid superframe index. + uint32_t i, j; + const uint8_t *x = &data[data_sz - index_sz + 1]; + + // Frames has a maximum of 8 and mag has a maximum of 4. + uint8_t clear_buffer[32]; + assert(sizeof(clear_buffer) >= frames * mag); + if (decrypt_cb) { + decrypt_cb(decrypt_state, x, clear_buffer, frames * mag); + x = clear_buffer; + } + + for (i = 0; i < frames; ++i) { + uint32_t this_sz = 0; + + for (j = 0; j < mag; ++j) + this_sz |= (uint32_t)(*x++) << (j * 8); + sizes[i] = this_sz; + } + *count = frames; + } + } + return VPX_CODEC_OK; +} |