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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 "dict.h"
#include "frame.h"
#include "imgutils.h"
#include "mem.h"
#include "samplefmt.h"
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)
#define CHECK_CHANNELS_CONSISTENCY(frame) \
av_assert2(!(frame)->channel_layout || \
(frame)->channels == \
av_get_channel_layout_nb_channels((frame)->channel_layout))
AVDictionary **avpriv_frame_get_metadatap(AVFrame *frame) {return &frame->metadata;};
int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int qp_type)
{
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;
return 0;
}
int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type)
{
*stride = f->qstride;
*type = f->qscale_type;
if (!f->qp_table_buf)
return NULL;
return f->qp_table_buf->data;
}
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 =
frame->pkt_pts = AV_NOPTS_VALUE;
av_frame_set_best_effort_timestamp(frame, AV_NOPTS_VALUE);
av_frame_set_pkt_duration (frame, 0);
av_frame_set_pkt_pos (frame, -1);
av_frame_set_pkt_size (frame, -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;
}
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]) {
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 = FF_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 & AV_PIX_FMT_FLAG_PSEUDOPAL) {
av_buffer_unref(&frame->buf[1]);
frame->buf[1] = av_buffer_alloc(1024);
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->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_AVFRAME_LAVC
dst->type = src->type;
#endif
dst->pkt_pts = src->pkt_pts;
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);
memcpy(dst->error, src->error, sizeof(dst->error));
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 {
sd_dst = av_frame_new_side_data(dst, sd_src->type, 0);
if (!sd_dst) {
wipe_side_data(dst);
return AVERROR(ENOMEM);
}
sd_dst->buf = av_buffer_ref(sd_src->buf);
if (!sd_dst->buf) {
wipe_side_data(dst);
return AVERROR(ENOMEM);
}
sd_dst->data = sd_dst->buf->data;
sd_dst->size = sd_dst->buf->size;
}
av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0);
}
dst->qscale_table = NULL;
dst->qstride = 0;
dst->qscale_type = 0;
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;
}
}
return 0;
}
int av_frame_ref(AVFrame *dst, const AVFrame *src)
{
int i, ret = 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;
}
}
}
/* 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;
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);
av_buffer_unref(&frame->qp_table_buf);
get_frame_defaults(frame);
}
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
{
*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(AVFrame *frame,
enum AVFrameSideDataType type,
int size)
{
AVFrameSideData *ret, **tmp;
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;
if (size > 0) {
ret->buf = av_buffer_alloc(size);
if (!ret->buf) {
av_freep(&ret);
return NULL;
}
ret->data = ret->buf->data;
ret->size = size;
}
ret->type = type;
frame->side_data[frame->nb_side_data++] = ret;
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->channel_layout)
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_MOTION_VECTORS: return "Motion vectors";
}
return NULL;
}
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