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FFmpeg/libavutil/frame.c
wm4 d6fc031caf avutil/pixdesc: deprecate AV_PIX_FMT_FLAG_PSEUDOPAL 
PSEUDOPAL pixel formats are not paletted, but carried a palette with the
intention of allowing code to treat unpaletted formats as paletted. The
palette simply mapped the byte values to the resulting RGB values,
making it some sort of LUT for RGB conversion.

It was used for 1 byte formats only: RGB4_BYTE, BGR4_BYTE, RGB8, BGR8,
GRAY8. The first 4 are awfully obscure, used only by some ancient bitmap
formats. The last one, GRAY8, is more common, but its treatment is
grossly incorrect. It considers full range GRAY8 only, so GRAY8 coming
from typical Y video planes was not mapped to the correct RGB values.
This cannot be fixed, because AVFrame.color_range can be freely changed
at runtime, and there is nothing to ensure the pseudo palette is
updated.

Also, nothing actually used the PSEUDOPAL palette data, except xwdenc
(trivially changed in the previous commit). All other code had to treat
it as a special case, just to ignore or to propagate palette data.

In conclusion, this was just a very strange old mechnaism that has no
real justification to exist anymore (although it may have been nice and
useful in the past). Now it's an artifact that makes the API harder to
use: API users who allocate their own pixel data have to be aware that
they need to allocate the palette, or FFmpeg will crash on them in
_some_ situations. On top of this, there was no API to allocate the
pseuo palette outside of av_frame_get_buffer().

This patch not only deprecates AV_PIX_FMT_FLAG_PSEUDOPAL, but also makes
the pseudo palette optional. Nothing accesses it anymore, though if it's
set, it's propagated. It's still allocated and initialized for
compatibility with API users that rely on this feature. But new API
users do not need to allocate it. This was an explicit goal of this
patch.

Most changes replace AV_PIX_FMT_FLAG_PSEUDOPAL with FF_PSEUDOPAL. I
first tried #ifdefing all code, but it was a mess. The FF_PSEUDOPAL
macro reduces the mess, and still allows defining FF_API_PSEUDOPAL to 0.

Passes FATE with FF_API_PSEUDOPAL enabled and disabled. In addition,
FATE passes with FF_API_PSEUDOPAL set to 1, but with allocation
functions manually changed to not allocating a palette.
2018-04-03 17:53:00 +02:00

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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 "dict.h"
#include "frame.h"
#include "imgutils.h"
#include "mem.h"
#include "samplefmt.h"
#if FF_API_FRAME_GET_SET
MAKE_ACCESSORS(AVFrame, frame, int64_t, best_effort_timestamp)
MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_duration)
MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_pos)
MAKE_ACCESSORS(AVFrame, frame, int64_t, channel_layout)
MAKE_ACCESSORS(AVFrame, frame, int, channels)
MAKE_ACCESSORS(AVFrame, frame, int, sample_rate)
MAKE_ACCESSORS(AVFrame, frame, AVDictionary *, metadata)
MAKE_ACCESSORS(AVFrame, frame, int, decode_error_flags)
MAKE_ACCESSORS(AVFrame, frame, int, pkt_size)
MAKE_ACCESSORS(AVFrame, frame, enum AVColorSpace, colorspace)
MAKE_ACCESSORS(AVFrame, frame, enum AVColorRange, color_range)
#endif
#define CHECK_CHANNELS_CONSISTENCY(frame) \
av_assert2(!(frame)->channel_layout || \
(frame)->channels == \
av_get_channel_layout_nb_channels((frame)->channel_layout))
#if FF_API_FRAME_QP
struct qp_properties {
int stride;
int type;
};
int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int qp_type)
{
struct qp_properties *p;
AVFrameSideData *sd;
AVBufferRef *ref;
FF_DISABLE_DEPRECATION_WARNINGS
av_buffer_unref(&f->qp_table_buf);
f->qp_table_buf = buf;
f->qscale_table = buf->data;
f->qstride = stride;
f->qscale_type = qp_type;
FF_ENABLE_DEPRECATION_WARNINGS
av_frame_remove_side_data(f, AV_FRAME_DATA_QP_TABLE_PROPERTIES);
av_frame_remove_side_data(f, AV_FRAME_DATA_QP_TABLE_DATA);
ref = av_buffer_ref(buf);
if (!av_frame_new_side_data_from_buf(f, AV_FRAME_DATA_QP_TABLE_DATA, ref)) {
av_buffer_unref(&ref);
return AVERROR(ENOMEM);
}
sd = av_frame_new_side_data(f, AV_FRAME_DATA_QP_TABLE_PROPERTIES,
sizeof(struct qp_properties));
if (!sd)
return AVERROR(ENOMEM);
p = (struct qp_properties *)sd->data;
p->stride = stride;
p->type = qp_type;
return 0;
}
int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type)
{
AVBufferRef *buf = NULL;
*stride = 0;
*type = 0;
FF_DISABLE_DEPRECATION_WARNINGS
if (f->qp_table_buf) {
*stride = f->qstride;
*type = f->qscale_type;
buf = f->qp_table_buf;
FF_ENABLE_DEPRECATION_WARNINGS
} else {
AVFrameSideData *sd;
struct qp_properties *p;
sd = av_frame_get_side_data(f, AV_FRAME_DATA_QP_TABLE_PROPERTIES);
if (!sd)
return NULL;
p = (struct qp_properties *)sd->data;
sd = av_frame_get_side_data(f, AV_FRAME_DATA_QP_TABLE_DATA);
if (!sd)
return NULL;
*stride = p->stride;
*type = p->type;
buf = sd->buf;
}
return buf ? buf->data : NULL;
}
#endif
const char *av_get_colorspace_name(enum AVColorSpace val)
{
static const char * const name[] = {
[AVCOL_SPC_RGB] = "GBR",
[AVCOL_SPC_BT709] = "bt709",
[AVCOL_SPC_FCC] = "fcc",
[AVCOL_SPC_BT470BG] = "bt470bg",
[AVCOL_SPC_SMPTE170M] = "smpte170m",
[AVCOL_SPC_SMPTE240M] = "smpte240m",
[AVCOL_SPC_YCOCG] = "YCgCo",
};
if ((unsigned)val >= FF_ARRAY_ELEMS(name))
return NULL;
return name[val];
}
static void get_frame_defaults(AVFrame *frame)
{
if (frame->extended_data != frame->data)
av_freep(&frame->extended_data);
memset(frame, 0, sizeof(*frame));
frame->pts =
frame->pkt_dts = AV_NOPTS_VALUE;
#if FF_API_PKT_PTS
FF_DISABLE_DEPRECATION_WARNINGS
frame->pkt_pts = AV_NOPTS_VALUE;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
frame->best_effort_timestamp = AV_NOPTS_VALUE;
frame->pkt_duration = 0;
frame->pkt_pos = -1;
frame->pkt_size = -1;
frame->key_frame = 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)
{
int i;
for (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_mallocz(sizeof(*frame));
if (!frame)
return NULL;
frame->extended_data = 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, i;
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(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 (i = 0; i < 4 && frame->linesize[i]; i++)
frame->linesize[i] = FFALIGN(frame->linesize[i], align);
}
for (i = 0; i < 4 && frame->linesize[i]; i++) {
int h = FFALIGN(frame->height, 32);
if (i == 1 || i == 2)
h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
frame->buf[i] = av_buffer_alloc(frame->linesize[i] * h + 16 + 16/*STRIDE_ALIGN*/ - 1);
if (!frame->buf[i])
goto fail;
frame->data[i] = frame->buf[i]->data;
}
if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & FF_PSEUDOPAL) {
av_buffer_unref(&frame->buf[1]);
frame->buf[1] = av_buffer_alloc(AVPALETTE_SIZE);
if (!frame->buf[1])
goto fail;
frame->data[1] = frame->buf[1]->data;
}
frame->extended_data = frame->data;
return 0;
fail:
av_frame_unref(frame);
return AVERROR(ENOMEM);
}
static int get_audio_buffer(AVFrame *frame, int align)
{
int channels;
int planar = av_sample_fmt_is_planar(frame->format);
int planes;
int ret, i;
if (!frame->channels)
frame->channels = av_get_channel_layout_nb_channels(frame->channel_layout);
channels = frame->channels;
planes = planar ? channels : 1;
CHECK_CHANNELS_CONSISTENCY(frame);
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_mallocz_array(planes,
sizeof(*frame->extended_data));
frame->extended_buf = av_mallocz_array((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 (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 (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);
if (frame->width > 0 && frame->height > 0)
return get_video_buffer(frame, align);
else if (frame->nb_samples > 0 && (frame->channel_layout || frame->channels > 0))
return get_audio_buffer(frame, align);
return AVERROR(EINVAL);
}
static int frame_copy_props(AVFrame *dst, const AVFrame *src, int force_copy)
{
int i;
dst->key_frame = src->key_frame;
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->repeat_pict = src->repeat_pict;
dst->interlaced_frame = src->interlaced_frame;
dst->top_field_first = src->top_field_first;
dst->palette_has_changed = src->palette_has_changed;
dst->sample_rate = src->sample_rate;
dst->opaque = src->opaque;
#if FF_API_PKT_PTS
FF_DISABLE_DEPRECATION_WARNINGS
dst->pkt_pts = src->pkt_pts;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
dst->pkt_dts = src->pkt_dts;
dst->pkt_pos = src->pkt_pos;
dst->pkt_size = src->pkt_size;
dst->pkt_duration = src->pkt_duration;
dst->reordered_opaque = src->reordered_opaque;
dst->quality = src->quality;
dst->best_effort_timestamp = src->best_effort_timestamp;
dst->coded_picture_number = src->coded_picture_number;
dst->display_picture_number = src->display_picture_number;
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);
#if FF_API_ERROR_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
memcpy(dst->error, src->error, sizeof(dst->error));
FF_ENABLE_DEPRECATION_WARNINGS
#endif
for (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);
}
#if FF_API_FRAME_QP
FF_DISABLE_DEPRECATION_WARNINGS
dst->qscale_table = NULL;
dst->qstride = 0;
dst->qscale_type = 0;
av_buffer_unref(&dst->qp_table_buf);
if (src->qp_table_buf) {
dst->qp_table_buf = av_buffer_ref(src->qp_table_buf);
if (dst->qp_table_buf) {
dst->qscale_table = dst->qp_table_buf->data;
dst->qstride = src->qstride;
dst->qscale_type = src->qscale_type;
}
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
av_buffer_unref(&dst->opaque_ref);
av_buffer_unref(&dst->private_ref);
if (src->opaque_ref) {
dst->opaque_ref = av_buffer_ref(src->opaque_ref);
if (!dst->opaque_ref)
return AVERROR(ENOMEM);
}
if (src->private_ref) {
dst->private_ref = av_buffer_ref(src->private_ref);
if (!dst->private_ref)
return AVERROR(ENOMEM);
}
return 0;
}
int av_frame_ref(AVFrame *dst, const AVFrame *src)
{
int i, ret = 0;
av_assert1(dst->width == 0 && dst->height == 0);
av_assert1(dst->channels == 0);
dst->format = src->format;
dst->width = src->width;
dst->height = src->height;
dst->channels = src->channels;
dst->channel_layout = src->channel_layout;
dst->nb_samples = src->nb_samples;
ret = frame_copy_props(dst, src, 0);
if (ret < 0)
return ret;
/* duplicate the frame data if it's not refcounted */
if (!src->buf[0]) {
ret = av_frame_get_buffer(dst, 32);
if (ret < 0)
return ret;
ret = av_frame_copy(dst, src);
if (ret < 0)
av_frame_unref(dst);
return ret;
}
/* ref the buffers */
for (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_mallocz_array(sizeof(*dst->extended_buf),
src->nb_extended_buf);
if (!dst->extended_buf) {
ret = AVERROR(ENOMEM);
goto fail;
}
dst->nb_extended_buf = src->nb_extended_buf;
for (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 = src->channels;
if (!ch) {
ret = AVERROR(EINVAL);
goto fail;
}
CHECK_CHANNELS_CONSISTENCY(src);
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)
{
int i;
if (!frame)
return;
wipe_side_data(frame);
for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
av_buffer_unref(&frame->buf[i]);
for (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);
#if FF_API_FRAME_QP
FF_DISABLE_DEPRECATION_WARNINGS
av_buffer_unref(&frame->qp_table_buf);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
av_buffer_unref(&frame->hw_frames_ctx);
av_buffer_unref(&frame->opaque_ref);
av_buffer_unref(&frame->private_ref);
get_frame_defaults(frame);
}
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
{
av_assert1(dst->width == 0 && dst->height == 0);
av_assert1(dst->channels == 0);
*dst = *src;
if (src->extended_data == src->data)
dst->extended_data = dst->data;
memset(src, 0, sizeof(*src));
get_frame_defaults(src);
}
int av_frame_is_writable(AVFrame *frame)
{
int i, ret = 1;
/* assume non-refcounted frames are not writable */
if (!frame->buf[0])
return 0;
for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
if (frame->buf[i])
ret &= !!av_buffer_is_writable(frame->buf[i]);
for (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 (!frame->buf[0])
return AVERROR(EINVAL);
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;
tmp.channels = frame->channels;
tmp.channel_layout = frame->channel_layout;
tmp.nb_samples = frame->nb_samples;
ret = av_frame_get_buffer(&tmp, 32);
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(AVFrame *frame, int plane)
{
uint8_t *data;
int planes, i;
if (frame->nb_samples) {
int channels = frame->channels;
if (!channels)
return NULL;
CHECK_CHANNELS_CONSISTENCY(frame);
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 (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 (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,
int 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)
{
int i;
for (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 i, planes;
if (dst->width < src->width ||
dst->height < src->height)
return AVERROR(EINVAL);
planes = av_pix_fmt_count_planes(dst->format);
for (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->channels;
int planes = planar ? channels : 1;
int i;
if (dst->nb_samples != src->nb_samples ||
dst->channels != src->channels ||
dst->channel_layout != src->channel_layout)
return AVERROR(EINVAL);
CHECK_CHANNELS_CONSISTENCY(src);
for (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);
if (dst->width > 0 && dst->height > 0)
return frame_copy_video(dst, src);
else if (dst->nb_samples > 0 && dst->channels > 0)
return frame_copy_audio(dst, src);
return AVERROR(EINVAL);
}
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
{
int i;
for (i = 0; i < frame->nb_side_data; 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 "Stereoscopic 3d metadata";
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_ICC_PROFILE: return "ICC profile";
case AV_FRAME_DATA_QP_TABLE_PROPERTIES: return "QP table properties";
case AV_FRAME_DATA_QP_TABLE_DATA: return "QP table data";
}
return NULL;
}
static int calc_cropping_offsets(size_t offsets[4], const AVFrame *frame,
const AVPixFmtDescriptor *desc)
{
int i, j;
for (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 | FF_PSEUDOPAL) && i == 1) {
offsets[i] = 0;
break;
}
/* find any component descriptor for this plane */
for (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];
int i;
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 (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 (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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