Add m-esr52 at 52.6.0

1 files changed, 425 insertions, 0 deletions

diff --git a/media/ffvpx/libavutil/imgutils.c b/media/ffvpx/libavutil/imgutils.c
new file mode 100644
index 000000000..37808e53d
--- /dev/null
+++ b/media/ffvpx/libavutil/imgutils.c
@@ -0,0 +1,425 @@
+/*
+ * 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
+ */
+
+/**
+ * @file
+ * misc image utilities
+ */
+
+#include "avassert.h"
+#include "common.h"
+#include "imgutils.h"
+#include "internal.h"
+#include "intreadwrite.h"
+#include "log.h"
+#include "mathematics.h"
+#include "pixdesc.h"
+#include "rational.h"
+
+void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
+                                const AVPixFmtDescriptor *pixdesc)
+{
+    int i;
+    memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0]));
+    if (max_pixstep_comps)
+        memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0]));
+
+    for (i = 0; i < 4; i++) {
+        const AVComponentDescriptor *comp = &(pixdesc->comp[i]);
+        if (comp->step > max_pixsteps[comp->plane]) {
+            max_pixsteps[comp->plane] = comp->step;
+            if (max_pixstep_comps)
+                max_pixstep_comps[comp->plane] = i;
+        }
+    }
+}
+
+static inline
+int image_get_linesize(int width, int plane,
+                       int max_step, int max_step_comp,
+                       const AVPixFmtDescriptor *desc)
+{
+    int s, shifted_w, linesize;
+
+    if (!desc)
+        return AVERROR(EINVAL);
+
+    if (width < 0)
+        return AVERROR(EINVAL);
+    s = (max_step_comp == 1 || max_step_comp == 2) ? desc->log2_chroma_w : 0;
+    shifted_w = ((width + (1 << s) - 1)) >> s;
+    if (shifted_w && max_step > INT_MAX / shifted_w)
+        return AVERROR(EINVAL);
+    linesize = max_step * shifted_w;
+
+    if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM)
+        linesize = (linesize + 7) >> 3;
+    return linesize;
+}
+
+int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+    int max_step     [4];       /* max pixel step for each plane */
+    int max_step_comp[4];       /* the component for each plane which has the max pixel step */
+
+    if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
+        return AVERROR(EINVAL);
+
+    av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
+    return image_get_linesize(width, plane, max_step[plane], max_step_comp[plane], desc);
+}
+
+int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
+{
+    int i, ret;
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+    int max_step     [4];       /* max pixel step for each plane */
+    int max_step_comp[4];       /* the component for each plane which has the max pixel step */
+
+    memset(linesizes, 0, 4*sizeof(linesizes[0]));
+
+    if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
+        return AVERROR(EINVAL);
+
+    av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
+    for (i = 0; i < 4; i++) {
+        if ((ret = image_get_linesize(width, i, max_step[i], max_step_comp[i], desc)) < 0)
+            return ret;
+        linesizes[i] = ret;
+    }
+
+    return 0;
+}
+
+int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height,
+                           uint8_t *ptr, const int linesizes[4])
+{
+    int i, total_size, size[4] = { 0 }, has_plane[4] = { 0 };
+
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+    memset(data     , 0, sizeof(data[0])*4);
+
+    if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
+        return AVERROR(EINVAL);
+
+    data[0] = ptr;
+    if (linesizes[0] > (INT_MAX - 1024) / height)
+        return AVERROR(EINVAL);
+    size[0] = linesizes[0] * height;
+
+    if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
+        desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
+        data[1] = ptr + size[0]; /* palette is stored here as 256 32 bits words */
+        return size[0] + 256 * 4;
+    }
+
+    for (i = 0; i < 4; i++)
+        has_plane[desc->comp[i].plane] = 1;
+
+    total_size = size[0];
+    for (i = 1; i < 4 && has_plane[i]; i++) {
+        int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
+        data[i] = data[i-1] + size[i-1];
+        h = (height + (1 << s) - 1) >> s;
+        if (linesizes[i] > INT_MAX / h)
+            return AVERROR(EINVAL);
+        size[i] = h * linesizes[i];
+        if (total_size > INT_MAX - size[i])
+            return AVERROR(EINVAL);
+        total_size += size[i];
+    }
+
+    return total_size;
+}
+
+int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
+{
+    int i;
+
+    for (i = 0; i < 256; i++) {
+        int r, g, b;
+
+        switch (pix_fmt) {
+        case AV_PIX_FMT_RGB8:
+            r = (i>>5    )*36;
+            g = ((i>>2)&7)*36;
+            b = (i&3     )*85;
+            break;
+        case AV_PIX_FMT_BGR8:
+            b = (i>>6    )*85;
+            g = ((i>>3)&7)*36;
+            r = (i&7     )*36;
+            break;
+        case AV_PIX_FMT_RGB4_BYTE:
+            r = (i>>3    )*255;
+            g = ((i>>1)&3)*85;
+            b = (i&1     )*255;
+            break;
+        case AV_PIX_FMT_BGR4_BYTE:
+            b = (i>>3    )*255;
+            g = ((i>>1)&3)*85;
+            r = (i&1     )*255;
+            break;
+        case AV_PIX_FMT_GRAY8:
+            r = b = g = i;
+            break;
+        default:
+            return AVERROR(EINVAL);
+        }
+        pal[i] = b + (g << 8) + (r << 16) + (0xFFU << 24);
+    }
+
+    return 0;
+}
+
+int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
+                   int w, int h, enum AVPixelFormat pix_fmt, int align)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+    int i, ret;
+    uint8_t *buf;
+
+    if (!desc)
+        return AVERROR(EINVAL);
+
+    if ((ret = av_image_check_size(w, h, 0, NULL)) < 0)
+        return ret;
+    if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, align>7 ? FFALIGN(w, 8) : w)) < 0)
+        return ret;
+
+    for (i = 0; i < 4; i++)
+        linesizes[i] = FFALIGN(linesizes[i], align);
+
+    if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, NULL, linesizes)) < 0)
+        return ret;
+    buf = av_malloc(ret + align);
+    if (!buf)
+        return AVERROR(ENOMEM);
+    if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) {
+        av_free(buf);
+        return ret;
+    }
+    if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
+        avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
+        if (align < 4) {
+            av_log(NULL, AV_LOG_ERROR, "Formats with a palette require a minimum alignment of 4\n");
+            return AVERROR(EINVAL);
+        }
+    }
+
+    if ((desc->flags & AV_PIX_FMT_FLAG_PAL ||
+         desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) &&
+        pointers[1] - pointers[0] > linesizes[0] * h) {
+        /* zero-initialize the padding before the palette */
+        memset(pointers[0] + linesizes[0] * h, 0,
+               pointers[1] - pointers[0] - linesizes[0] * h);
+    }
+
+    return ret;
+}
+
+typedef struct ImgUtils {
+    const AVClass *class;
+    int   log_offset;
+    void *log_ctx;
+} ImgUtils;
+
+static const AVClass imgutils_class = {
+    .class_name = "IMGUTILS",
+    .item_name  = av_default_item_name,
+    .version    = LIBAVUTIL_VERSION_INT,
+    .log_level_offset_offset   = offsetof(ImgUtils, log_offset),
+    .parent_log_context_offset = offsetof(ImgUtils, log_ctx),
+};
+
+int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
+{
+    ImgUtils imgutils = {
+        .class      = &imgutils_class,
+        .log_offset = log_offset,
+        .log_ctx    = log_ctx,
+    };
+
+    if ((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
+        return 0;
+
+    av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h);
+    return AVERROR(EINVAL);
+}
+
+int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
+{
+    int64_t scaled_dim;
+
+    if (sar.den <= 0 || sar.num < 0)
+        return AVERROR(EINVAL);
+
+    if (!sar.num || sar.num == sar.den)
+        return 0;
+
+    if (sar.num < sar.den)
+        scaled_dim = av_rescale_rnd(w, sar.num, sar.den, AV_ROUND_ZERO);
+    else
+        scaled_dim = av_rescale_rnd(h, sar.den, sar.num, AV_ROUND_ZERO);
+
+    if (scaled_dim > 0)
+        return 0;
+
+    return AVERROR(EINVAL);
+}
+
+void av_image_copy_plane(uint8_t       *dst, int dst_linesize,
+                         const uint8_t *src, int src_linesize,
+                         int bytewidth, int height)
+{
+    if (!dst || !src)
+        return;
+    av_assert0(abs(src_linesize) >= bytewidth);
+    av_assert0(abs(dst_linesize) >= bytewidth);
+    for (;height > 0; height--) {
+        memcpy(dst, src, bytewidth);
+        dst += dst_linesize;
+        src += src_linesize;
+    }
+}
+
+void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
+                   const uint8_t *src_data[4], const int src_linesizes[4],
+                   enum AVPixelFormat pix_fmt, int width, int height)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+
+    if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
+        return;
+
+    if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
+        desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
+        av_image_copy_plane(dst_data[0], dst_linesizes[0],
+                            src_data[0], src_linesizes[0],
+                            width, height);
+        /* copy the palette */
+        memcpy(dst_data[1], src_data[1], 4*256);
+    } else {
+        int i, planes_nb = 0;
+
+        for (i = 0; i < desc->nb_components; i++)
+            planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1);
+
+        for (i = 0; i < planes_nb; i++) {
+            int h = height;
+            int bwidth = av_image_get_linesize(pix_fmt, width, i);
+            if (bwidth < 0) {
+                av_log(NULL, AV_LOG_ERROR, "av_image_get_linesize failed\n");
+                return;
+            }
+            if (i == 1 || i == 2) {
+                h = AV_CEIL_RSHIFT(height, desc->log2_chroma_h);
+            }
+            av_image_copy_plane(dst_data[i], dst_linesizes[i],
+                                src_data[i], src_linesizes[i],
+                                bwidth, h);
+        }
+    }
+}
+
+int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4],
+                         const uint8_t *src, enum AVPixelFormat pix_fmt,
+                         int width, int height, int align)
+{
+    int ret, i;
+
+    ret = av_image_check_size(width, height, 0, NULL);
+    if (ret < 0)
+        return ret;
+
+    ret = av_image_fill_linesizes(dst_linesize, pix_fmt, width);
+    if (ret < 0)
+        return ret;
+
+    for (i = 0; i < 4; i++)
+        dst_linesize[i] = FFALIGN(dst_linesize[i], align);
+
+    return av_image_fill_pointers(dst_data, pix_fmt, height, (uint8_t *)src, dst_linesize);
+}
+
+int av_image_get_buffer_size(enum AVPixelFormat pix_fmt,
+                             int width, int height, int align)
+{
+    uint8_t *data[4];
+    int linesize[4];
+    int ret;
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+    if (!desc)
+        return AVERROR(EINVAL);
+
+    ret = av_image_check_size(width, height, 0, NULL);
+    if (ret < 0)
+        return ret;
+
+    // do not include palette for these pseudo-paletted formats
+    if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
+        return FFALIGN(width, align) * height;
+
+    return av_image_fill_arrays(data, linesize, NULL, pix_fmt,
+                                width, height, align);
+}
+
+int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
+                            const uint8_t * const src_data[4],
+                            const int src_linesize[4],
+                            enum AVPixelFormat pix_fmt,
+                            int width, int height, int align)
+{
+    int i, j, nb_planes = 0, linesize[4];
+    int size = av_image_get_buffer_size(pix_fmt, width, height, align);
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+    int ret;
+
+    if (size > dst_size || size < 0 || !desc)
+        return AVERROR(EINVAL);
+
+    for (i = 0; i < desc->nb_components; i++)
+        nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
+
+    nb_planes++;
+
+    ret = av_image_fill_linesizes(linesize, pix_fmt, width);
+    av_assert0(ret >= 0); // was checked previously
+
+    for (i = 0; i < nb_planes; i++) {
+        int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
+        const uint8_t *src = src_data[i];
+        h = (height + (1 << shift) - 1) >> shift;
+
+        for (j = 0; j < h; j++) {
+            memcpy(dst, src, linesize[i]);
+            dst += FFALIGN(linesize[i], align);
+            src += src_linesize[i];
+        }
+    }
+
+    if (desc->flags & AV_PIX_FMT_FLAG_PAL) {
+        uint32_t *d32 = (uint32_t *)dst;
+
+        for (i = 0; i<256; i++)
+            AV_WL32(d32 + i, AV_RN32(src_data[1] + 4*i));
+    }
+
+    return size;
+}