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ffmpeg/libavutil/frame.c

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/*
* 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 "channel_layout.h"
#include "avassert.h"
#include "buffer.h"
#include "common.h"
#include "cpu.h"
#include "dict.h"
#include "frame.h"
#include "imgutils.h"
#include "mem.h"
#include "samplefmt.h"
#include "hwcontext.h"
#if FF_API_OLD_CHANNEL_LAYOUT
#define CHECK_CHANNELS_CONSISTENCY(frame) \
av_assert2(!(frame)->channel_layout || \
(frame)->channels == \
av_get_channel_layout_nb_channels((frame)->channel_layout))
#endif
static void get_frame_defaults(AVFrame *frame)
{
memset(frame, 0, sizeof(*frame));
frame->pts =
frame->pkt_dts = AV_NOPTS_VALUE;
frame->best_effort_timestamp = AV_NOPTS_VALUE;
frame->duration = 0;
#if FF_API_PKT_DURATION
FF_DISABLE_DEPRECATION_WARNINGS
frame->pkt_duration = 0;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
frame->pkt_pos = -1;
frame->pkt_size = -1;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
frame->time_base = (AVRational){ 0, 1 };
frame->sample_aspect_ratio = (AVRational){ 0, 1 };
frame->format = -1; /* unknown */
frame->extended_data = frame->data;
frame->color_primaries = AVCOL_PRI_UNSPECIFIED;
frame->color_trc = AVCOL_TRC_UNSPECIFIED;
frame->colorspace = AVCOL_SPC_UNSPECIFIED;
frame->color_range = AVCOL_RANGE_UNSPECIFIED;
frame->chroma_location = AVCHROMA_LOC_UNSPECIFIED;
frame->flags = 0;
}
static void free_side_data(AVFrameSideData **ptr_sd)
{
AVFrameSideData *sd = *ptr_sd;
av_buffer_unref(&sd->buf);
av_dict_free(&sd->metadata);
av_freep(ptr_sd);
}
static void wipe_side_data(AVFrame *frame)
{
for (int i = 0; i < frame->nb_side_data; i++) {
free_side_data(&frame->side_data[i]);
}
frame->nb_side_data = 0;
av_freep(&frame->side_data);
}
AVFrame *av_frame_alloc(void)
{
AVFrame *frame = av_malloc(sizeof(*frame));
if (!frame)
return NULL;
get_frame_defaults(frame);
return frame;
}
void av_frame_free(AVFrame **frame)
{
if (!frame || !*frame)
return;
av_frame_unref(*frame);
av_freep(frame);
}
static int get_video_buffer(AVFrame *frame, int align)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
int ret, padded_height, total_size;
int plane_padding = FFMAX(16 + 16/*STRIDE_ALIGN*/, align);
ptrdiff_t linesizes[4];
size_t sizes[4];
if (!desc)
return AVERROR(EINVAL);
if ((ret = av_image_check_size(frame->width, frame->height, 0, NULL)) < 0)
return ret;
if (!frame->linesize[0]) {
if (align <= 0)
align = 32; /* STRIDE_ALIGN. Should be av_cpu_max_align() */
for (int i = 1; i <= align; i += i) {
ret = av_image_fill_linesizes(frame->linesize, frame->format,
FFALIGN(frame->width, i));
if (ret < 0)
return ret;
if (!(frame->linesize[0] & (align-1)))
break;
}
for (int i = 0; i < 4 && frame->linesize[i]; i++)
frame->linesize[i] = FFALIGN(frame->linesize[i], align);
}
for (int i = 0; i < 4; i++)
linesizes[i] = frame->linesize[i];
padded_height = FFALIGN(frame->height, 32);
if ((ret = av_image_fill_plane_sizes(sizes, frame->format,
padded_height, linesizes)) < 0)
return ret;
total_size = 4*plane_padding;
for (int i = 0; i < 4; i++) {
if (sizes[i] > INT_MAX - total_size)
return AVERROR(EINVAL);
total_size += sizes[i];
}
frame->buf[0] = av_buffer_alloc(total_size);
if (!frame->buf[0]) {
ret = AVERROR(ENOMEM);
goto fail;
}
if ((ret = av_image_fill_pointers(frame->data, frame->format, padded_height,
frame->buf[0]->data, frame->linesize)) < 0)
goto fail;
for (int i = 1; i < 4; i++) {
if (frame->data[i])
frame->data[i] += i * plane_padding;
}
frame->extended_data = frame->data;
return 0;
fail:
av_frame_unref(frame);
return ret;
}
static int get_audio_buffer(AVFrame *frame, int align)
{
int planar = av_sample_fmt_is_planar(frame->format);
int channels, planes;
int ret;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
if (!frame->ch_layout.nb_channels) {
if (frame->channel_layout) {
av_channel_layout_from_mask(&frame->ch_layout, frame->channel_layout);
} else {
frame->ch_layout.nb_channels = frame->channels;
frame->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
}
}
frame->channels = frame->ch_layout.nb_channels;
frame->channel_layout = frame->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
frame->ch_layout.u.mask : 0;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
channels = frame->ch_layout.nb_channels;
planes = planar ? channels : 1;
if (!frame->linesize[0]) {
ret = av_samples_get_buffer_size(&frame->linesize[0], channels,
frame->nb_samples, frame->format,
align);
if (ret < 0)
return ret;
}
if (planes > AV_NUM_DATA_POINTERS) {
frame->extended_data = av_calloc(planes,
sizeof(*frame->extended_data));
frame->extended_buf = av_calloc(planes - AV_NUM_DATA_POINTERS,
sizeof(*frame->extended_buf));
if (!frame->extended_data || !frame->extended_buf) {
av_freep(&frame->extended_data);
av_freep(&frame->extended_buf);
return AVERROR(ENOMEM);
}
frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
} else
frame->extended_data = frame->data;
for (int i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
frame->buf[i] = av_buffer_alloc(frame->linesize[0]);
if (!frame->buf[i]) {
av_frame_unref(frame);
return AVERROR(ENOMEM);
}
frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
}
for (int i = 0; i < planes - AV_NUM_DATA_POINTERS; i++) {
frame->extended_buf[i] = av_buffer_alloc(frame->linesize[0]);
if (!frame->extended_buf[i]) {
av_frame_unref(frame);
return AVERROR(ENOMEM);
}
frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
}
return 0;
}
int av_frame_get_buffer(AVFrame *frame, int align)
{
if (frame->format < 0)
return AVERROR(EINVAL);
FF_DISABLE_DEPRECATION_WARNINGS
if (frame->width > 0 && frame->height > 0)
return get_video_buffer(frame, align);
else if (frame->nb_samples > 0 &&
(av_channel_layout_check(&frame->ch_layout)
#if FF_API_OLD_CHANNEL_LAYOUT
|| frame->channel_layout || frame->channels > 0
#endif
))
return get_audio_buffer(frame, align);
FF_ENABLE_DEPRECATION_WARNINGS
return AVERROR(EINVAL);
}
static int frame_copy_props(AVFrame *dst, const AVFrame *src, int force_copy)
{
int ret;
#if FF_API_FRAME_KEY
FF_DISABLE_DEPRECATION_WARNINGS
dst->key_frame = src->key_frame;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
dst->pict_type = src->pict_type;
dst->sample_aspect_ratio = src->sample_aspect_ratio;
dst->crop_top = src->crop_top;
dst->crop_bottom = src->crop_bottom;
dst->crop_left = src->crop_left;
dst->crop_right = src->crop_right;
dst->pts = src->pts;
dst->duration = src->duration;
dst->repeat_pict = src->repeat_pict;
#if FF_API_INTERLACED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
dst->interlaced_frame = src->interlaced_frame;
dst->top_field_first = src->top_field_first;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
dst->palette_has_changed = src->palette_has_changed;
dst->sample_rate = src->sample_rate;
dst->opaque = src->opaque;
dst->pkt_dts = src->pkt_dts;
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
dst->pkt_pos = src->pkt_pos;
dst->pkt_size = src->pkt_size;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
#if FF_API_PKT_DURATION
FF_DISABLE_DEPRECATION_WARNINGS
dst->pkt_duration = src->pkt_duration;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
dst->time_base = src->time_base;
#if FF_API_REORDERED_OPAQUE
FF_DISABLE_DEPRECATION_WARNINGS
dst->reordered_opaque = src->reordered_opaque;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
dst->quality = src->quality;
dst->best_effort_timestamp = src->best_effort_timestamp;
#if FF_API_FRAME_PICTURE_NUMBER
FF_DISABLE_DEPRECATION_WARNINGS
dst->coded_picture_number = src->coded_picture_number;
dst->display_picture_number = src->display_picture_number;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
dst->flags = src->flags;
dst->decode_error_flags = src->decode_error_flags;
dst->color_primaries = src->color_primaries;
dst->color_trc = src->color_trc;
dst->colorspace = src->colorspace;
dst->color_range = src->color_range;
dst->chroma_location = src->chroma_location;
av_dict_copy(&dst->metadata, src->metadata, 0);
for (int i = 0; i < src->nb_side_data; i++) {
const AVFrameSideData *sd_src = src->side_data[i];
AVFrameSideData *sd_dst;
if ( sd_src->type == AV_FRAME_DATA_PANSCAN
&& (src->width != dst->width || src->height != dst->height))
continue;
if (force_copy) {
sd_dst = av_frame_new_side_data(dst, sd_src->type,
sd_src->size);
if (!sd_dst) {
wipe_side_data(dst);
return AVERROR(ENOMEM);
}
memcpy(sd_dst->data, sd_src->data, sd_src->size);
} else {
AVBufferRef *ref = av_buffer_ref(sd_src->buf);
sd_dst = av_frame_new_side_data_from_buf(dst, sd_src->type, ref);
if (!sd_dst) {
av_buffer_unref(&ref);
wipe_side_data(dst);
return AVERROR(ENOMEM);
}
}
av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0);
}
ret = av_buffer_replace(&dst->opaque_ref, src->opaque_ref);
ret |= av_buffer_replace(&dst->private_ref, src->private_ref);
return ret;
}
int av_frame_ref(AVFrame *dst, const AVFrame *src)
{
int ret = 0;
av_assert1(dst->width == 0 && dst->height == 0);
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
av_assert1(dst->channels == 0);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
av_assert1(dst->ch_layout.nb_channels == 0 &&
dst->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC);
dst->format = src->format;
dst->width = src->width;
dst->height = src->height;
dst->nb_samples = src->nb_samples;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
dst->channels = src->channels;
dst->channel_layout = src->channel_layout;
if (!av_channel_layout_check(&src->ch_layout)) {
if (src->channel_layout)
av_channel_layout_from_mask(&dst->ch_layout, src->channel_layout);
else {
dst->ch_layout.nb_channels = src->channels;
dst->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
}
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
ret = frame_copy_props(dst, src, 0);
if (ret < 0)
goto fail;
// this check is needed only until FF_API_OLD_CHANNEL_LAYOUT is out
if (av_channel_layout_check(&src->ch_layout)) {
ret = av_channel_layout_copy(&dst->ch_layout, &src->ch_layout);
if (ret < 0)
goto fail;
}
/* duplicate the frame data if it's not refcounted */
if (!src->buf[0]) {
ret = av_frame_get_buffer(dst, 0);
if (ret < 0)
goto fail;
ret = av_frame_copy(dst, src);
if (ret < 0)
goto fail;
return 0;
}
/* ref the buffers */
for (int i = 0; i < FF_ARRAY_ELEMS(src->buf); i++) {
if (!src->buf[i])
continue;
dst->buf[i] = av_buffer_ref(src->buf[i]);
if (!dst->buf[i]) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
if (src->extended_buf) {
dst->extended_buf = av_calloc(src->nb_extended_buf,
sizeof(*dst->extended_buf));
if (!dst->extended_buf) {
ret = AVERROR(ENOMEM);
goto fail;
}
dst->nb_extended_buf = src->nb_extended_buf;
for (int i = 0; i < src->nb_extended_buf; i++) {
dst->extended_buf[i] = av_buffer_ref(src->extended_buf[i]);
if (!dst->extended_buf[i]) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
}
if (src->hw_frames_ctx) {
dst->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx);
if (!dst->hw_frames_ctx) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
/* duplicate extended data */
if (src->extended_data != src->data) {
int ch = dst->ch_layout.nb_channels;
if (!ch) {
ret = AVERROR(EINVAL);
goto fail;
}
dst->extended_data = av_malloc_array(sizeof(*dst->extended_data), ch);
if (!dst->extended_data) {
ret = AVERROR(ENOMEM);
goto fail;
}
memcpy(dst->extended_data, src->extended_data, sizeof(*src->extended_data) * ch);
} else
dst->extended_data = dst->data;
memcpy(dst->data, src->data, sizeof(src->data));
memcpy(dst->linesize, src->linesize, sizeof(src->linesize));
return 0;
fail:
av_frame_unref(dst);
return ret;
}
AVFrame *av_frame_clone(const AVFrame *src)
{
AVFrame *ret = av_frame_alloc();
if (!ret)
return NULL;
if (av_frame_ref(ret, src) < 0)
av_frame_free(&ret);
return ret;
}
void av_frame_unref(AVFrame *frame)
{
if (!frame)
return;
wipe_side_data(frame);
for (int i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
av_buffer_unref(&frame->buf[i]);
for (int i = 0; i < frame->nb_extended_buf; i++)
av_buffer_unref(&frame->extended_buf[i]);
av_freep(&frame->extended_buf);
av_dict_free(&frame->metadata);
av_buffer_unref(&frame->hw_frames_ctx);
av_buffer_unref(&frame->opaque_ref);
av_buffer_unref(&frame->private_ref);
if (frame->extended_data != frame->data)
av_freep(&frame->extended_data);
av_channel_layout_uninit(&frame->ch_layout);
get_frame_defaults(frame);
}
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
{
av_assert1(dst->width == 0 && dst->height == 0);
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
av_assert1(dst->channels == 0);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
av_assert1(dst->ch_layout.nb_channels == 0 &&
dst->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC);
*dst = *src;
if (src->extended_data == src->data)
dst->extended_data = dst->data;
get_frame_defaults(src);
}
int av_frame_is_writable(AVFrame *frame)
{
int ret = 1;
/* assume non-refcounted frames are not writable */
if (!frame->buf[0])
return 0;
for (int i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
if (frame->buf[i])
ret &= !!av_buffer_is_writable(frame->buf[i]);
for (int i = 0; i < frame->nb_extended_buf; i++)
ret &= !!av_buffer_is_writable(frame->extended_buf[i]);
return ret;
}
int av_frame_make_writable(AVFrame *frame)
{
AVFrame tmp;
int ret;
if (av_frame_is_writable(frame))
return 0;
memset(&tmp, 0, sizeof(tmp));
tmp.format = frame->format;
tmp.width = frame->width;
tmp.height = frame->height;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
tmp.channels = frame->channels;
tmp.channel_layout = frame->channel_layout;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
tmp.nb_samples = frame->nb_samples;
ret = av_channel_layout_copy(&tmp.ch_layout, &frame->ch_layout);
if (ret < 0) {
av_frame_unref(&tmp);
return ret;
}
if (frame->hw_frames_ctx)
ret = av_hwframe_get_buffer(frame->hw_frames_ctx, &tmp, 0);
else
ret = av_frame_get_buffer(&tmp, 0);
if (ret < 0)
return ret;
ret = av_frame_copy(&tmp, frame);
if (ret < 0) {
av_frame_unref(&tmp);
return ret;
}
ret = av_frame_copy_props(&tmp, frame);
if (ret < 0) {
av_frame_unref(&tmp);
return ret;
}
av_frame_unref(frame);
*frame = tmp;
if (tmp.data == tmp.extended_data)
frame->extended_data = frame->data;
return 0;
}
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
{
return frame_copy_props(dst, src, 1);
}
AVBufferRef *av_frame_get_plane_buffer(const AVFrame *frame, int plane)
{
uint8_t *data;
int planes;
if (frame->nb_samples) {
int channels = frame->ch_layout.nb_channels;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
if (!channels) {
channels = frame->channels;
CHECK_CHANNELS_CONSISTENCY(frame);
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (!channels)
return NULL;
planes = av_sample_fmt_is_planar(frame->format) ? channels : 1;
} else
planes = 4;
if (plane < 0 || plane >= planes || !frame->extended_data[plane])
return NULL;
data = frame->extended_data[plane];
for (int i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++) {
AVBufferRef *buf = frame->buf[i];
if (data >= buf->data && data < buf->data + buf->size)
return buf;
}
for (int i = 0; i < frame->nb_extended_buf; i++) {
AVBufferRef *buf = frame->extended_buf[i];
if (data >= buf->data && data < buf->data + buf->size)
return buf;
}
return NULL;
}
AVFrameSideData *av_frame_new_side_data_from_buf(AVFrame *frame,
enum AVFrameSideDataType type,
AVBufferRef *buf)
{
AVFrameSideData *ret, **tmp;
if (!buf)
return NULL;
if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1)
return NULL;
tmp = av_realloc(frame->side_data,
(frame->nb_side_data + 1) * sizeof(*frame->side_data));
if (!tmp)
return NULL;
frame->side_data = tmp;
ret = av_mallocz(sizeof(*ret));
if (!ret)
return NULL;
ret->buf = buf;
ret->data = ret->buf->data;
ret->size = buf->size;
ret->type = type;
frame->side_data[frame->nb_side_data++] = ret;
return ret;
}
AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
enum AVFrameSideDataType type,
size_t size)
{
AVFrameSideData *ret;
AVBufferRef *buf = av_buffer_alloc(size);
ret = av_frame_new_side_data_from_buf(frame, type, buf);
if (!ret)
av_buffer_unref(&buf);
return ret;
}
AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
enum AVFrameSideDataType type)
{
for (int i = 0; i < frame->nb_side_data; i++) {
if (frame->side_data[i]->type == type)
return frame->side_data[i];
}
return NULL;
}
static int frame_copy_video(AVFrame *dst, const AVFrame *src)
{
const uint8_t *src_data[4];
int planes;
if (dst->width < src->width ||
dst->height < src->height)
return AVERROR(EINVAL);
if (src->hw_frames_ctx || dst->hw_frames_ctx)
return av_hwframe_transfer_data(dst, src, 0);
planes = av_pix_fmt_count_planes(dst->format);
for (int i = 0; i < planes; i++)
if (!dst->data[i] || !src->data[i])
return AVERROR(EINVAL);
memcpy(src_data, src->data, sizeof(src_data));
av_image_copy(dst->data, dst->linesize,
src_data, src->linesize,
dst->format, src->width, src->height);
return 0;
}
static int frame_copy_audio(AVFrame *dst, const AVFrame *src)
{
int planar = av_sample_fmt_is_planar(dst->format);
int channels = dst->ch_layout.nb_channels;
int planes = planar ? channels : 1;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
if (!channels || !src->ch_layout.nb_channels) {
if (dst->channels != src->channels ||
dst->channel_layout != src->channel_layout)
return AVERROR(EINVAL);
CHECK_CHANNELS_CONSISTENCY(src);
}
if (!channels) {
channels = dst->channels;
planes = planar ? channels : 1;
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (dst->nb_samples != src->nb_samples ||
#if FF_API_OLD_CHANNEL_LAYOUT
(av_channel_layout_check(&dst->ch_layout) &&
av_channel_layout_check(&src->ch_layout) &&
#endif
av_channel_layout_compare(&dst->ch_layout, &src->ch_layout))
#if FF_API_OLD_CHANNEL_LAYOUT
)
#endif
return AVERROR(EINVAL);
for (int i = 0; i < planes; i++)
if (!dst->extended_data[i] || !src->extended_data[i])
return AVERROR(EINVAL);
av_samples_copy(dst->extended_data, src->extended_data, 0, 0,
dst->nb_samples, channels, dst->format);
return 0;
}
int av_frame_copy(AVFrame *dst, const AVFrame *src)
{
if (dst->format != src->format || dst->format < 0)
return AVERROR(EINVAL);
FF_DISABLE_DEPRECATION_WARNINGS
if (dst->width > 0 && dst->height > 0)
return frame_copy_video(dst, src);
else if (dst->nb_samples > 0 &&
(av_channel_layout_check(&dst->ch_layout)
#if FF_API_OLD_CHANNEL_LAYOUT
|| dst->channels > 0
#endif
))
return frame_copy_audio(dst, src);
FF_ENABLE_DEPRECATION_WARNINGS
return AVERROR(EINVAL);
}
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
{
for (int i = frame->nb_side_data - 1; i >= 0; i--) {
AVFrameSideData *sd = frame->side_data[i];
if (sd->type == type) {
free_side_data(&frame->side_data[i]);
frame->side_data[i] = frame->side_data[frame->nb_side_data - 1];
frame->nb_side_data--;
}
}
}
const char *av_frame_side_data_name(enum AVFrameSideDataType type)
{
switch(type) {
case AV_FRAME_DATA_PANSCAN: return "AVPanScan";
case AV_FRAME_DATA_A53_CC: return "ATSC A53 Part 4 Closed Captions";
case AV_FRAME_DATA_STEREO3D: return "Stereo 3D";
case AV_FRAME_DATA_MATRIXENCODING: return "AVMatrixEncoding";
case AV_FRAME_DATA_DOWNMIX_INFO: return "Metadata relevant to a downmix procedure";
case AV_FRAME_DATA_REPLAYGAIN: return "AVReplayGain";
case AV_FRAME_DATA_DISPLAYMATRIX: return "3x3 displaymatrix";
case AV_FRAME_DATA_AFD: return "Active format description";
case AV_FRAME_DATA_MOTION_VECTORS: return "Motion vectors";
case AV_FRAME_DATA_SKIP_SAMPLES: return "Skip samples";
case AV_FRAME_DATA_AUDIO_SERVICE_TYPE: return "Audio service type";
case AV_FRAME_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
case AV_FRAME_DATA_CONTENT_LIGHT_LEVEL: return "Content light level metadata";
case AV_FRAME_DATA_GOP_TIMECODE: return "GOP timecode";
case AV_FRAME_DATA_S12M_TIMECODE: return "SMPTE 12-1 timecode";
case AV_FRAME_DATA_SPHERICAL: return "Spherical Mapping";
case AV_FRAME_DATA_ICC_PROFILE: return "ICC profile";
case AV_FRAME_DATA_DYNAMIC_HDR_PLUS: return "HDR Dynamic Metadata SMPTE2094-40 (HDR10+)";
case AV_FRAME_DATA_DYNAMIC_HDR_VIVID: return "HDR Dynamic Metadata CUVA 005.1 2021 (Vivid)";
case AV_FRAME_DATA_REGIONS_OF_INTEREST: return "Regions Of Interest";
case AV_FRAME_DATA_VIDEO_ENC_PARAMS: return "Video encoding parameters";
case AV_FRAME_DATA_SEI_UNREGISTERED: return "H.26[45] User Data Unregistered SEI message";
case AV_FRAME_DATA_FILM_GRAIN_PARAMS: return "Film grain parameters";
case AV_FRAME_DATA_DETECTION_BBOXES: return "Bounding boxes for object detection and classification";
case AV_FRAME_DATA_DOVI_RPU_BUFFER: return "Dolby Vision RPU Data";
case AV_FRAME_DATA_DOVI_METADATA: return "Dolby Vision Metadata";
case AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT: return "Ambient viewing environment";
}
return NULL;
}
static int calc_cropping_offsets(size_t offsets[4], const AVFrame *frame,
const AVPixFmtDescriptor *desc)
{
for (int i = 0; frame->data[i]; i++) {
const AVComponentDescriptor *comp = NULL;
int shift_x = (i == 1 || i == 2) ? desc->log2_chroma_w : 0;
int shift_y = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
if (desc->flags & AV_PIX_FMT_FLAG_PAL && i == 1) {
offsets[i] = 0;
break;
}
/* find any component descriptor for this plane */
for (int j = 0; j < desc->nb_components; j++) {
if (desc->comp[j].plane == i) {
comp = &desc->comp[j];
break;
}
}
if (!comp)
return AVERROR_BUG;
offsets[i] = (frame->crop_top >> shift_y) * frame->linesize[i] +
(frame->crop_left >> shift_x) * comp->step;
}
return 0;
}
int av_frame_apply_cropping(AVFrame *frame, int flags)
{
const AVPixFmtDescriptor *desc;
size_t offsets[4];
if (!(frame->width > 0 && frame->height > 0))
return AVERROR(EINVAL);
if (frame->crop_left >= INT_MAX - frame->crop_right ||
frame->crop_top >= INT_MAX - frame->crop_bottom ||
(frame->crop_left + frame->crop_right) >= frame->width ||
(frame->crop_top + frame->crop_bottom) >= frame->height)
return AVERROR(ERANGE);
desc = av_pix_fmt_desc_get(frame->format);
if (!desc)
return AVERROR_BUG;
/* Apply just the right/bottom cropping for hwaccel formats. Bitstream
* formats cannot be easily handled here either (and corresponding decoders
* should not export any cropping anyway), so do the same for those as well.
* */
if (desc->flags & (AV_PIX_FMT_FLAG_BITSTREAM | AV_PIX_FMT_FLAG_HWACCEL)) {
frame->width -= frame->crop_right;
frame->height -= frame->crop_bottom;
frame->crop_right = 0;
frame->crop_bottom = 0;
return 0;
}
/* calculate the offsets for each plane */
calc_cropping_offsets(offsets, frame, desc);
/* adjust the offsets to avoid breaking alignment */
if (!(flags & AV_FRAME_CROP_UNALIGNED)) {
int log2_crop_align = frame->crop_left ? ff_ctz(frame->crop_left) : INT_MAX;
int min_log2_align = INT_MAX;
for (int i = 0; frame->data[i]; i++) {
int log2_align = offsets[i] ? ff_ctz(offsets[i]) : INT_MAX;
min_log2_align = FFMIN(log2_align, min_log2_align);
}
/* we assume, and it should always be true, that the data alignment is
* related to the cropping alignment by a constant power-of-2 factor */
if (log2_crop_align < min_log2_align)
return AVERROR_BUG;
if (min_log2_align < 5) {
frame->crop_left &= ~((1 << (5 + log2_crop_align - min_log2_align)) - 1);
calc_cropping_offsets(offsets, frame, desc);
}
}
for (int i = 0; frame->data[i]; i++)
frame->data[i] += offsets[i];
frame->width -= (frame->crop_left + frame->crop_right);
frame->height -= (frame->crop_top + frame->crop_bottom);
frame->crop_left = 0;
frame->crop_right = 0;
frame->crop_top = 0;
frame->crop_bottom = 0;
return 0;
}
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