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b12a36170b
FFmpeg/libavcodec/decode.c
Anton Khirnov d14179e3d4 hwframe: Allow hwaccel frame allocators to align surface sizes 
Hardware accelerated decoding generally uses AVHWFramesContext for pool
allocation of hardware surfaces. These are setup to allocate surfaces
aligned to hardware and hwaccel API requirements. Due to the
architecture, av_hwframe_get_buffer() will return AVFrames with
the dimensions set to the aligned sizes.

This causes some decoders (like hevc) return these aligned size as
final frame size, instead of cropping them to the video's actual
dimensions. To make sure this doesn't happen, crop the frame to the
size the decoder expects when ff_get_buffer() is called.

Merges Libav commit 3fdf50f9e8.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
2017-06-27 18:05:02 +02:00

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/*
* generic decoding-related code
*
* 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 <stdint.h>
#include <string.h>
#include "config.h"
#if CONFIG_ICONV
# include <iconv.h>
#endif
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/common.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intmath.h"
#include "avcodec.h"
#include "bytestream.h"
#include "decode.h"
#include "internal.h"
#include "thread.h"
static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt)
{
int size = 0, ret;
const uint8_t *data;
uint32_t flags;
int64_t val;
data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
if (!data)
return 0;
if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) {
av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
"changes, but PARAM_CHANGE side data was sent to it.\n");
ret = AVERROR(EINVAL);
goto fail2;
}
if (size < 4)
goto fail;
flags = bytestream_get_le32(&data);
size -= 4;
if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
if (size < 4)
goto fail;
val = bytestream_get_le32(&data);
if (val <= 0 || val > INT_MAX) {
av_log(avctx, AV_LOG_ERROR, "Invalid channel count");
ret = AVERROR_INVALIDDATA;
goto fail2;
}
avctx->channels = val;
size -= 4;
}
if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
if (size < 8)
goto fail;
avctx->channel_layout = bytestream_get_le64(&data);
size -= 8;
}
if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
if (size < 4)
goto fail;
val = bytestream_get_le32(&data);
if (val <= 0 || val > INT_MAX) {
av_log(avctx, AV_LOG_ERROR, "Invalid sample rate");
ret = AVERROR_INVALIDDATA;
goto fail2;
}
avctx->sample_rate = val;
size -= 4;
}
if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
if (size < 8)
goto fail;
avctx->width = bytestream_get_le32(&data);
avctx->height = bytestream_get_le32(&data);
size -= 8;
ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
if (ret < 0)
goto fail2;
}
return 0;
fail:
av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
ret = AVERROR_INVALIDDATA;
fail2:
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
if (avctx->err_recognition & AV_EF_EXPLODE)
return ret;
}
return 0;
}
static int extract_packet_props(AVCodecInternal *avci, const AVPacket *pkt)
{
int ret = 0;
av_packet_unref(avci->last_pkt_props);
if (pkt) {
ret = av_packet_copy_props(avci->last_pkt_props, pkt);
if (!ret)
avci->last_pkt_props->size = pkt->size; // HACK: Needed for ff_init_buffer_info().
}
return ret;
}
static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame)
{
int ret;
/* move the original frame to our backup */
av_frame_unref(avci->to_free);
av_frame_move_ref(avci->to_free, frame);
/* now copy everything except the AVBufferRefs back
* note that we make a COPY of the side data, so calling av_frame_free() on
* the caller's frame will work properly */
ret = av_frame_copy_props(frame, avci->to_free);
if (ret < 0)
return ret;
memcpy(frame->data, avci->to_free->data, sizeof(frame->data));
memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize));
if (avci->to_free->extended_data != avci->to_free->data) {
int planes = avci->to_free->channels;
int size = planes * sizeof(*frame->extended_data);
if (!size) {
av_frame_unref(frame);
return AVERROR_BUG;
}
frame->extended_data = av_malloc(size);
if (!frame->extended_data) {
av_frame_unref(frame);
return AVERROR(ENOMEM);
}
memcpy(frame->extended_data, avci->to_free->extended_data,
size);
} else
frame->extended_data = frame->data;
frame->format = avci->to_free->format;
frame->width = avci->to_free->width;
frame->height = avci->to_free->height;
frame->channel_layout = avci->to_free->channel_layout;
frame->nb_samples = avci->to_free->nb_samples;
frame->channels = avci->to_free->channels;
return 0;
}
static int bsfs_init(AVCodecContext *avctx)
{
AVCodecInternal *avci = avctx->internal;
DecodeFilterContext *s = &avci->filter;
const char *bsfs_str;
int ret;
if (s->nb_bsfs)
return 0;
bsfs_str = avctx->codec->bsfs ? avctx->codec->bsfs : "null";
while (bsfs_str && *bsfs_str) {
AVBSFContext **tmp;
const AVBitStreamFilter *filter;
char *bsf;
bsf = av_get_token(&bsfs_str, ",");
if (!bsf) {
ret = AVERROR(ENOMEM);
goto fail;
}
filter = av_bsf_get_by_name(bsf);
if (!filter) {
av_log(avctx, AV_LOG_ERROR, "A non-existing bitstream filter %s "
"requested by a decoder. This is a bug, please report it.\n",
bsf);
ret = AVERROR_BUG;
av_freep(&bsf);
goto fail;
}
av_freep(&bsf);
tmp = av_realloc_array(s->bsfs, s->nb_bsfs + 1, sizeof(*s->bsfs));
if (!tmp) {
ret = AVERROR(ENOMEM);
goto fail;
}
s->bsfs = tmp;
s->nb_bsfs++;
ret = av_bsf_alloc(filter, &s->bsfs[s->nb_bsfs - 1]);
if (ret < 0)
goto fail;
if (s->nb_bsfs == 1) {
/* We do not currently have an API for passing the input timebase into decoders,
* but no filters used here should actually need it.
* So we make up some plausible-looking number (the MPEG 90kHz timebase) */
s->bsfs[s->nb_bsfs - 1]->time_base_in = (AVRational){ 1, 90000 };
ret = avcodec_parameters_from_context(s->bsfs[s->nb_bsfs - 1]->par_in,
avctx);
} else {
s->bsfs[s->nb_bsfs - 1]->time_base_in = s->bsfs[s->nb_bsfs - 2]->time_base_out;
ret = avcodec_parameters_copy(s->bsfs[s->nb_bsfs - 1]->par_in,
s->bsfs[s->nb_bsfs - 2]->par_out);
}
if (ret < 0)
goto fail;
ret = av_bsf_init(s->bsfs[s->nb_bsfs - 1]);
if (ret < 0)
goto fail;
}
return 0;
fail:
ff_decode_bsfs_uninit(avctx);
return ret;
}
/* try to get one output packet from the filter chain */
static int bsfs_poll(AVCodecContext *avctx, AVPacket *pkt)
{
DecodeFilterContext *s = &avctx->internal->filter;
int idx, ret;
/* start with the last filter in the chain */
idx = s->nb_bsfs - 1;
while (idx >= 0) {
/* request a packet from the currently selected filter */
ret = av_bsf_receive_packet(s->bsfs[idx], pkt);
if (ret == AVERROR(EAGAIN)) {
/* no packets available, try the next filter up the chain */
ret = 0;
idx--;
continue;
} else if (ret < 0 && ret != AVERROR_EOF) {
return ret;
}
/* got a packet or EOF -- pass it to the caller or to the next filter
* down the chain */
if (idx == s->nb_bsfs - 1) {
return ret;
} else {
idx++;
ret = av_bsf_send_packet(s->bsfs[idx], ret < 0 ? NULL : pkt);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR,
"Error pre-processing a packet before decoding\n");
av_packet_unref(pkt);
return ret;
}
}
}
return AVERROR(EAGAIN);
}
int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
{
AVCodecInternal *avci = avctx->internal;
int ret;
if (avci->draining)
return AVERROR_EOF;
ret = bsfs_poll(avctx, pkt);
if (ret == AVERROR_EOF)
avci->draining = 1;
if (ret < 0)
return ret;
ret = extract_packet_props(avctx->internal, pkt);
if (ret < 0)
goto finish;
ret = apply_param_change(avctx, pkt);
if (ret < 0)
goto finish;
if (avctx->codec->receive_frame)
avci->compat_decode_consumed += pkt->size;
return 0;
finish:
av_packet_unref(pkt);
return ret;
}
/**
* Attempt to guess proper monotonic timestamps for decoded video frames
* which might have incorrect times. Input timestamps may wrap around, in
* which case the output will as well.
*
* @param pts the pts field of the decoded AVPacket, as passed through
* AVFrame.pts
* @param dts the dts field of the decoded AVPacket
* @return one of the input values, may be AV_NOPTS_VALUE
*/
static int64_t guess_correct_pts(AVCodecContext *ctx,
int64_t reordered_pts, int64_t dts)
{
int64_t pts = AV_NOPTS_VALUE;
if (dts != AV_NOPTS_VALUE) {
ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
ctx->pts_correction_last_dts = dts;
} else if (reordered_pts != AV_NOPTS_VALUE)
ctx->pts_correction_last_dts = reordered_pts;
if (reordered_pts != AV_NOPTS_VALUE) {
ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
ctx->pts_correction_last_pts = reordered_pts;
} else if(dts != AV_NOPTS_VALUE)
ctx->pts_correction_last_pts = dts;
if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
&& reordered_pts != AV_NOPTS_VALUE)
pts = reordered_pts;
else
pts = dts;
return pts;
}
/*
* The core of the receive_frame_wrapper for the decoders implementing
* the simple API. Certain decoders might consume partial packets without
* returning any output, so this function needs to be called in a loop until it
* returns EAGAIN.
**/
static int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
DecodeSimpleContext *ds = &avci->ds;
AVPacket *pkt = ds->in_pkt;
// copy to ensure we do not change pkt
AVPacket tmp;
int got_frame, actual_got_frame, did_split;
int ret;
if (!pkt->data && !avci->draining) {
av_packet_unref(pkt);
ret = ff_decode_get_packet(avctx, pkt);
if (ret < 0 && ret != AVERROR_EOF)
return ret;
}
// Some codecs (at least wma lossless) will crash when feeding drain packets
// after EOF was signaled.
if (avci->draining_done)
return AVERROR_EOF;
if (!pkt->data &&
!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
avctx->active_thread_type & FF_THREAD_FRAME))
return AVERROR_EOF;
tmp = *pkt;
#if FF_API_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
did_split = avci->compat_decode_partial_size ?
ff_packet_split_and_drop_side_data(&tmp) :
av_packet_split_side_data(&tmp);
if (did_split) {
ret = extract_packet_props(avctx->internal, &tmp);
if (ret < 0)
return ret;
ret = apply_param_change(avctx, &tmp);
if (ret < 0)
return ret;
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
got_frame = 0;
if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) {
ret = ff_thread_decode_frame(avctx, frame, &got_frame, &tmp);
} else {
ret = avctx->codec->decode(avctx, frame, &got_frame, &tmp);
if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS))
frame->pkt_dts = pkt->dts;
if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
if(!avctx->has_b_frames)
frame->pkt_pos = pkt->pos;
//FIXME these should be under if(!avctx->has_b_frames)
/* get_buffer is supposed to set frame parameters */
if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) {
if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
if (!frame->width) frame->width = avctx->width;
if (!frame->height) frame->height = avctx->height;
if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt;
}
}
}
emms_c();
actual_got_frame = got_frame;
if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
if (frame->flags & AV_FRAME_FLAG_DISCARD)
got_frame = 0;
if (got_frame)
frame->best_effort_timestamp = guess_correct_pts(avctx,
frame->pts,
frame->pkt_dts);
} else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
uint8_t *side;
int side_size;
uint32_t discard_padding = 0;
uint8_t skip_reason = 0;
uint8_t discard_reason = 0;
if (ret >= 0 && got_frame) {
frame->best_effort_timestamp = guess_correct_pts(avctx,
frame->pts,
frame->pkt_dts);
if (frame->format == AV_SAMPLE_FMT_NONE)
frame->format = avctx->sample_fmt;
if (!frame->channel_layout)
frame->channel_layout = avctx->channel_layout;
if (!frame->channels)
frame->channels = avctx->channels;
if (!frame->sample_rate)
frame->sample_rate = avctx->sample_rate;
}
side= av_packet_get_side_data(avci->last_pkt_props, AV_PKT_DATA_SKIP_SAMPLES, &side_size);
if(side && side_size>=10) {
avctx->internal->skip_samples = AV_RL32(side) * avctx->internal->skip_samples_multiplier;
discard_padding = AV_RL32(side + 4);
av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n",
avctx->internal->skip_samples, (int)discard_padding);
skip_reason = AV_RL8(side + 8);
discard_reason = AV_RL8(side + 9);
}
if ((frame->flags & AV_FRAME_FLAG_DISCARD) && got_frame &&
!(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
avctx->internal->skip_samples = FFMAX(0, avctx->internal->skip_samples - frame->nb_samples);
got_frame = 0;
}
if (avctx->internal->skip_samples > 0 && got_frame &&
!(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
if(frame->nb_samples <= avctx->internal->skip_samples){
got_frame = 0;
avctx->internal->skip_samples -= frame->nb_samples;
av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
avctx->internal->skip_samples);
} else {
av_samples_copy(frame->extended_data, frame->extended_data, 0, avctx->internal->skip_samples,
frame->nb_samples - avctx->internal->skip_samples, avctx->channels, frame->format);
if(avctx->pkt_timebase.num && avctx->sample_rate) {
int64_t diff_ts = av_rescale_q(avctx->internal->skip_samples,
(AVRational){1, avctx->sample_rate},
avctx->pkt_timebase);
if(frame->pts!=AV_NOPTS_VALUE)
frame->pts += diff_ts;
#if FF_API_PKT_PTS
FF_DISABLE_DEPRECATION_WARNINGS
if(frame->pkt_pts!=AV_NOPTS_VALUE)
frame->pkt_pts += diff_ts;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if(frame->pkt_dts!=AV_NOPTS_VALUE)
frame->pkt_dts += diff_ts;
if (frame->pkt_duration >= diff_ts)
frame->pkt_duration -= diff_ts;
} else {
av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n");
}
av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n",
avctx->internal->skip_samples, frame->nb_samples);
frame->nb_samples -= avctx->internal->skip_samples;
avctx->internal->skip_samples = 0;
}
}
if (discard_padding > 0 && discard_padding <= frame->nb_samples && got_frame &&
!(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
if (discard_padding == frame->nb_samples) {
got_frame = 0;
} else {
if(avctx->pkt_timebase.num && avctx->sample_rate) {
int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding,
(AVRational){1, avctx->sample_rate},
avctx->pkt_timebase);
frame->pkt_duration = diff_ts;
} else {
av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n");
}
av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n",
(int)discard_padding, frame->nb_samples);
frame->nb_samples -= discard_padding;
}
}
if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && got_frame) {
AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10);
if (fside) {
AV_WL32(fside->data, avctx->internal->skip_samples);
AV_WL32(fside->data + 4, discard_padding);
AV_WL8(fside->data + 8, skip_reason);
AV_WL8(fside->data + 9, discard_reason);
avctx->internal->skip_samples = 0;
}
}
}
#if FF_API_MERGE_SD
if (did_split) {
av_packet_free_side_data(&tmp);
if(ret == tmp.size)
ret = pkt->size;
}
#endif
if (avctx->codec->type == AVMEDIA_TYPE_AUDIO &&
!avci->showed_multi_packet_warning &&
ret >= 0 && ret != pkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) {
av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n");
avci->showed_multi_packet_warning = 1;
}
if (!got_frame)
av_frame_unref(frame);
if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED))
ret = pkt->size;
#if FF_API_AVCTX_TIMEBASE
if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
#endif
/* do not stop draining when actual_got_frame != 0 or ret < 0 */
/* got_frame == 0 but actual_got_frame != 0 when frame is discarded */
if (avctx->internal->draining && !actual_got_frame) {
if (ret < 0) {
/* prevent infinite loop if a decoder wrongly always return error on draining */
/* reasonable nb_errors_max = maximum b frames + thread count */
int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ?
avctx->thread_count : 1);
if (avci->nb_draining_errors++ >= nb_errors_max) {
av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. "
"Stop draining and force EOF.\n");
avci->draining_done = 1;
ret = AVERROR_BUG;
}
} else {
avci->draining_done = 1;
}
}
avci->compat_decode_consumed += ret;
if (ret >= pkt->size || ret < 0) {
av_packet_unref(pkt);
} else {
int consumed = ret;
pkt->data += consumed;
pkt->size -= consumed;
avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment.
pkt->pts = AV_NOPTS_VALUE;
pkt->dts = AV_NOPTS_VALUE;
avci->last_pkt_props->pts = AV_NOPTS_VALUE;
avci->last_pkt_props->dts = AV_NOPTS_VALUE;
}
if (got_frame)
av_assert0(frame->buf[0]);
return ret < 0 ? ret : 0;
}
static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame)
{
int ret;
while (!frame->buf[0]) {
ret = decode_simple_internal(avctx, frame);
if (ret < 0)
return ret;
}
return 0;
}
static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
int ret;
av_assert0(!frame->buf[0]);
if (avctx->codec->receive_frame)
ret = avctx->codec->receive_frame(avctx, frame);
else
ret = decode_simple_receive_frame(avctx, frame);
if (ret == AVERROR_EOF)
avci->draining_done = 1;
return ret;
}
int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
{
AVCodecInternal *avci = avctx->internal;
int ret;
if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
return AVERROR(EINVAL);
if (avctx->internal->draining)
return AVERROR_EOF;
if (avpkt && !avpkt->size && avpkt->data)
return AVERROR(EINVAL);
ret = bsfs_init(avctx);
if (ret < 0)
return ret;
av_packet_unref(avci->buffer_pkt);
if (avpkt && (avpkt->data || avpkt->side_data_elems)) {
ret = av_packet_ref(avci->buffer_pkt, avpkt);
if (ret < 0)
return ret;
}
ret = av_bsf_send_packet(avci->filter.bsfs[0], avci->buffer_pkt);
if (ret < 0) {
av_packet_unref(avci->buffer_pkt);
return ret;
}
if (!avci->buffer_frame->buf[0]) {
ret = decode_receive_frame_internal(avctx, avci->buffer_frame);
if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
return ret;
}
return 0;
}
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 | AV_PIX_FMT_FLAG_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;
}
static int apply_cropping(AVCodecContext *avctx, AVFrame *frame)
{
const AVPixFmtDescriptor *desc;
size_t offsets[4];
int i;
/* make sure we are noisy about decoders returning invalid cropping data */
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) {
av_log(avctx, AV_LOG_WARNING,
"Invalid cropping information set by a decoder: "
"%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER" "
"(frame size %dx%d). This is a bug, please report it\n",
frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom,
frame->width, frame->height);
frame->crop_left = 0;
frame->crop_right = 0;
frame->crop_top = 0;
frame->crop_bottom = 0;
return 0;
}
if (!avctx->apply_cropping)
return 0;
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 (!(avctx->flags & AV_CODEC_FLAG_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;
}
int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
int ret;
av_frame_unref(frame);
if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
return AVERROR(EINVAL);
ret = bsfs_init(avctx);
if (ret < 0)
return ret;
if (avci->buffer_frame->buf[0]) {
av_frame_move_ref(frame, avci->buffer_frame);
} else {
ret = decode_receive_frame_internal(avctx, frame);
if (ret < 0)
return ret;
}
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
ret = apply_cropping(avctx, frame);
if (ret < 0) {
av_frame_unref(frame);
return ret;
}
}
avctx->frame_number++;
return 0;
}
static int compat_decode(AVCodecContext *avctx, AVFrame *frame,
int *got_frame, const AVPacket *pkt)
{
AVCodecInternal *avci = avctx->internal;
int ret = 0;
av_assert0(avci->compat_decode_consumed == 0);
*got_frame = 0;
avci->compat_decode = 1;
if (avci->compat_decode_partial_size > 0 &&
avci->compat_decode_partial_size != pkt->size) {
av_log(avctx, AV_LOG_ERROR,
"Got unexpected packet size after a partial decode\n");
ret = AVERROR(EINVAL);
goto finish;
}
if (!avci->compat_decode_partial_size) {
ret = avcodec_send_packet(avctx, pkt);
if (ret == AVERROR_EOF)
ret = 0;
else if (ret == AVERROR(EAGAIN)) {
/* we fully drain all the output in each decode call, so this should not
* ever happen */
ret = AVERROR_BUG;
goto finish;
} else if (ret < 0)
goto finish;
}
while (ret >= 0) {
ret = avcodec_receive_frame(avctx, frame);
if (ret < 0) {
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
ret = 0;
goto finish;
}
if (frame != avci->compat_decode_frame) {
if (!avctx->refcounted_frames) {
ret = unrefcount_frame(avci, frame);
if (ret < 0)
goto finish;
}
*got_frame = 1;
frame = avci->compat_decode_frame;
} else {
if (!avci->compat_decode_warned) {
av_log(avctx, AV_LOG_WARNING, "The deprecated avcodec_decode_* "
"API cannot return all the frames for this decoder. "
"Some frames will be dropped. Update your code to the "
"new decoding API to fix this.\n");
avci->compat_decode_warned = 1;
}
}
if (avci->draining || (!avctx->codec->bsfs && avci->compat_decode_consumed < pkt->size))
break;
}
finish:
if (ret == 0) {
/* if there are any bsfs then assume full packet is always consumed */
if (avctx->codec->bsfs)
ret = pkt->size;
else
ret = FFMIN(avci->compat_decode_consumed, pkt->size);
}
avci->compat_decode_consumed = 0;
avci->compat_decode_partial_size = (ret >= 0) ? pkt->size - ret : 0;
return ret;
}
int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
const AVPacket *avpkt)
{
return compat_decode(avctx, picture, got_picture_ptr, avpkt);
}
int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
AVFrame *frame,
int *got_frame_ptr,
const AVPacket *avpkt)
{
return compat_decode(avctx, frame, got_frame_ptr, avpkt);
}
static void get_subtitle_defaults(AVSubtitle *sub)
{
memset(sub, 0, sizeof(*sub));
sub->pts = AV_NOPTS_VALUE;
}
#define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
static int recode_subtitle(AVCodecContext *avctx,
AVPacket *outpkt, const AVPacket *inpkt)
{
#if CONFIG_ICONV
iconv_t cd = (iconv_t)-1;
int ret = 0;
char *inb, *outb;
size_t inl, outl;
AVPacket tmp;
#endif
if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0)
return 0;
#if CONFIG_ICONV
cd = iconv_open("UTF-8", avctx->sub_charenc);
av_assert0(cd != (iconv_t)-1);
inb = inpkt->data;
inl = inpkt->size;
if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) {
av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n");
ret = AVERROR(ENOMEM);
goto end;
}
ret = av_new_packet(&tmp, inl * UTF8_MAX_BYTES);
if (ret < 0)
goto end;
outpkt->buf = tmp.buf;
outpkt->data = tmp.data;
outpkt->size = tmp.size;
outb = outpkt->data;
outl = outpkt->size;
if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
outl >= outpkt->size || inl != 0) {
ret = FFMIN(AVERROR(errno), -1);
av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" "
"from %s to UTF-8\n", inpkt->data, avctx->sub_charenc);
av_packet_unref(&tmp);
goto end;
}
outpkt->size -= outl;
memset(outpkt->data + outpkt->size, 0, outl);
end:
if (cd != (iconv_t)-1)
iconv_close(cd);
return ret;
#else
av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv");
return AVERROR(EINVAL);
#endif
}
static int utf8_check(const uint8_t *str)
{
const uint8_t *byte;
uint32_t codepoint, min;
while (*str) {
byte = str;
GET_UTF8(codepoint, *(byte++), return 0;);
min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 :
1 << (5 * (byte - str) - 4);
if (codepoint < min || codepoint >= 0x110000 ||
codepoint == 0xFFFE /* BOM */ ||
codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */)
return 0;
str = byte;
}
return 1;
}
#if FF_API_ASS_TIMING
static void insert_ts(AVBPrint *buf, int ts)
{
if (ts == -1) {
av_bprintf(buf, "9:59:59.99,");
} else {
int h, m, s;
h = ts/360000; ts -= 360000*h;
m = ts/ 6000; ts -= 6000*m;
s = ts/ 100; ts -= 100*s;
av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
}
}
static int convert_sub_to_old_ass_form(AVSubtitle *sub, const AVPacket *pkt, AVRational tb)
{
int i;
AVBPrint buf;
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
for (i = 0; i < sub->num_rects; i++) {
char *final_dialog;
const char *dialog;
AVSubtitleRect *rect = sub->rects[i];
int ts_start, ts_duration = -1;
long int layer;
if (rect->type != SUBTITLE_ASS || !strncmp(rect->ass, "Dialogue: ", 10))
continue;
av_bprint_clear(&buf);
/* skip ReadOrder */
dialog = strchr(rect->ass, ',');
if (!dialog)
continue;
dialog++;
/* extract Layer or Marked */
layer = strtol(dialog, (char**)&dialog, 10);
if (*dialog != ',')
continue;
dialog++;
/* rescale timing to ASS time base (ms) */
ts_start = av_rescale_q(pkt->pts, tb, av_make_q(1, 100));
if (pkt->duration != -1)
ts_duration = av_rescale_q(pkt->duration, tb, av_make_q(1, 100));
sub->end_display_time = FFMAX(sub->end_display_time, 10 * ts_duration);
/* construct ASS (standalone file form with timestamps) string */
av_bprintf(&buf, "Dialogue: %ld,", layer);
insert_ts(&buf, ts_start);
insert_ts(&buf, ts_duration == -1 ? -1 : ts_start + ts_duration);
av_bprintf(&buf, "%s\r\n", dialog);
final_dialog = av_strdup(buf.str);
if (!av_bprint_is_complete(&buf) || !final_dialog) {
av_freep(&final_dialog);
av_bprint_finalize(&buf, NULL);
return AVERROR(ENOMEM);
}
av_freep(&rect->ass);
rect->ass = final_dialog;
}
av_bprint_finalize(&buf, NULL);
return 0;
}
#endif
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
int *got_sub_ptr,
AVPacket *avpkt)
{
int i, ret = 0;
AVCodecInternal *avci = avctx->internal;
if (!avpkt->data && avpkt->size) {
av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
return AVERROR(EINVAL);
}
if (!avctx->codec)
return AVERROR(EINVAL);
if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) {
av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n");
return AVERROR(EINVAL);
}
*got_sub_ptr = 0;
get_subtitle_defaults(sub);
if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
AVPacket pkt_recoded;
AVPacket tmp = *avpkt;
#if FF_API_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
int did_split = avci->compat_decode_partial_size ?
ff_packet_split_and_drop_side_data(&tmp) :
av_packet_split_side_data(&tmp);
//apply_param_change(avctx, &tmp);
if (did_split) {
/* FFMIN() prevents overflow in case the packet wasn't allocated with
* proper padding.
* If the side data is smaller than the buffer padding size, the
* remaining bytes should have already been filled with zeros by the
* original packet allocation anyway. */
memset(tmp.data + tmp.size, 0,
FFMIN(avpkt->size - tmp.size, AV_INPUT_BUFFER_PADDING_SIZE));
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
pkt_recoded = tmp;
ret = recode_subtitle(avctx, &pkt_recoded, &tmp);
if (ret < 0) {
*got_sub_ptr = 0;
} else {
ret = extract_packet_props(avctx->internal, &pkt_recoded);
if (ret < 0)
return ret;
if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE)
sub->pts = av_rescale_q(avpkt->pts,
avctx->pkt_timebase, AV_TIME_BASE_Q);
ret = avctx->codec->decode(avctx, sub, got_sub_ptr, &pkt_recoded);
av_assert1((ret >= 0) >= !!*got_sub_ptr &&
!!*got_sub_ptr >= !!sub->num_rects);
#if FF_API_ASS_TIMING
if (avctx->sub_text_format == FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS
&& *got_sub_ptr && sub->num_rects) {
const AVRational tb = avctx->pkt_timebase.num ? avctx->pkt_timebase
: avctx->time_base;
int err = convert_sub_to_old_ass_form(sub, avpkt, tb);
if (err < 0)
ret = err;
}
#endif
if (sub->num_rects && !sub->end_display_time && avpkt->duration &&
avctx->pkt_timebase.num) {
AVRational ms = { 1, 1000 };
sub->end_display_time = av_rescale_q(avpkt->duration,
avctx->pkt_timebase, ms);
}
if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB)
sub->format = 0;
else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB)
sub->format = 1;
for (i = 0; i < sub->num_rects; i++) {
if (sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) {
av_log(avctx, AV_LOG_ERROR,
"Invalid UTF-8 in decoded subtitles text; "
"maybe missing -sub_charenc option\n");
avsubtitle_free(sub);
ret = AVERROR_INVALIDDATA;
break;
}
}
if (tmp.data != pkt_recoded.data) { // did we recode?
/* prevent from destroying side data from original packet */
pkt_recoded.side_data = NULL;
pkt_recoded.side_data_elems = 0;
av_packet_unref(&pkt_recoded);
}
}
#if FF_API_MERGE_SD
if (did_split) {
av_packet_free_side_data(&tmp);
if(ret == tmp.size)
ret = avpkt->size;
}
#endif
if (*got_sub_ptr)
avctx->frame_number++;
}
return ret;
}
static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
return desc->flags & AV_PIX_FMT_FLAG_HWACCEL;
}
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
{
while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
++fmt;
return fmt[0];
}
static AVHWAccel *find_hwaccel(enum AVCodecID codec_id,
enum AVPixelFormat pix_fmt)
{
AVHWAccel *hwaccel = NULL;
while ((hwaccel = av_hwaccel_next(hwaccel)))
if (hwaccel->id == codec_id
&& hwaccel->pix_fmt == pix_fmt)
return hwaccel;
return NULL;
}
static int setup_hwaccel(AVCodecContext *avctx,
const enum AVPixelFormat fmt,
const char *name)
{
AVHWAccel *hwa = find_hwaccel(avctx->codec_id, fmt);
int ret = 0;
if (!hwa) {
av_log(avctx, AV_LOG_ERROR,
"Could not find an AVHWAccel for the pixel format: %s",
name);
return AVERROR(ENOENT);
}
if (hwa->capabilities & HWACCEL_CODEC_CAP_EXPERIMENTAL &&
avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n",
hwa->name);
return AVERROR_PATCHWELCOME;
}
if (hwa->priv_data_size) {
avctx->internal->hwaccel_priv_data = av_mallocz(hwa->priv_data_size);
if (!avctx->internal->hwaccel_priv_data)
return AVERROR(ENOMEM);
}
avctx->hwaccel = hwa;
if (hwa->init) {
ret = hwa->init(avctx);
if (ret < 0) {
av_freep(&avctx->internal->hwaccel_priv_data);
avctx->hwaccel = NULL;
return ret;
}
}
return 0;
}
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
{
const AVPixFmtDescriptor *desc;
enum AVPixelFormat *choices;
enum AVPixelFormat ret;
unsigned n = 0;
while (fmt[n] != AV_PIX_FMT_NONE)
++n;
av_assert0(n >= 1);
avctx->sw_pix_fmt = fmt[n - 1];
av_assert2(!is_hwaccel_pix_fmt(avctx->sw_pix_fmt));
choices = av_malloc_array(n + 1, sizeof(*choices));
if (!choices)
return AV_PIX_FMT_NONE;
memcpy(choices, fmt, (n + 1) * sizeof(*choices));
for (;;) {
if (avctx->hwaccel && avctx->hwaccel->uninit)
avctx->hwaccel->uninit(avctx);
av_freep(&avctx->internal->hwaccel_priv_data);
avctx->hwaccel = NULL;
av_buffer_unref(&avctx->hw_frames_ctx);
ret = avctx->get_format(avctx, choices);
desc = av_pix_fmt_desc_get(ret);
if (!desc) {
ret = AV_PIX_FMT_NONE;
break;
}
if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
break;
#if FF_API_CAP_VDPAU
if (avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU)
break;
#endif
if (avctx->hw_frames_ctx) {
AVHWFramesContext *hw_frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
if (hw_frames_ctx->format != ret) {
av_log(avctx, AV_LOG_ERROR, "Format returned from get_buffer() "
"does not match the format of provided AVHWFramesContext\n");
ret = AV_PIX_FMT_NONE;
break;
}
}
if (!setup_hwaccel(avctx, ret, desc->name))
break;
/* Remove failed hwaccel from choices */
for (n = 0; choices[n] != ret; n++)
av_assert0(choices[n] != AV_PIX_FMT_NONE);
do
choices[n] = choices[n + 1];
while (choices[n++] != AV_PIX_FMT_NONE);
}
av_freep(&choices);
return ret;
}
static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
{
FramePool *pool = avctx->internal->pool;
int i, ret;
switch (avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO: {
uint8_t *data[4];
int linesize[4];
int size[4] = { 0 };
int w = frame->width;
int h = frame->height;
int tmpsize, unaligned;
if (pool->format == frame->format &&
pool->width == frame->width && pool->height == frame->height)
return 0;
avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
do {
// NOTE: do not align linesizes individually, this breaks e.g. assumptions
// that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w);
if (ret < 0)
return ret;
// increase alignment of w for next try (rhs gives the lowest bit set in w)
w += w & ~(w - 1);
unaligned = 0;
for (i = 0; i < 4; i++)
unaligned |= linesize[i] % pool->stride_align[i];
} while (unaligned);
tmpsize = av_image_fill_pointers(data, avctx->pix_fmt, h,
NULL, linesize);
if (tmpsize < 0)
return -1;
for (i = 0; i < 3 && data[i + 1]; i++)
size[i] = data[i + 1] - data[i];
size[i] = tmpsize - (data[i] - data[0]);
for (i = 0; i < 4; i++) {
av_buffer_pool_uninit(&pool->pools[i]);
pool->linesize[i] = linesize[i];
if (size[i]) {
pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1,
CONFIG_MEMORY_POISONING ?
NULL :
av_buffer_allocz);
if (!pool->pools[i]) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
}
pool->format = frame->format;
pool->width = frame->width;
pool->height = frame->height;
break;
}
case AVMEDIA_TYPE_AUDIO: {
int ch = frame->channels; //av_get_channel_layout_nb_channels(frame->channel_layout);
int planar = av_sample_fmt_is_planar(frame->format);
int planes = planar ? ch : 1;
if (pool->format == frame->format && pool->planes == planes &&
pool->channels == ch && frame->nb_samples == pool->samples)
return 0;
av_buffer_pool_uninit(&pool->pools[0]);
ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
frame->nb_samples, frame->format, 0);
if (ret < 0)
goto fail;
pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
if (!pool->pools[0]) {
ret = AVERROR(ENOMEM);
goto fail;
}
pool->format = frame->format;
pool->planes = planes;
pool->channels = ch;
pool->samples = frame->nb_samples;
break;
}
default: av_assert0(0);
}
return 0;
fail:
for (i = 0; i < 4; i++)
av_buffer_pool_uninit(&pool->pools[i]);
pool->format = -1;
pool->planes = pool->channels = pool->samples = 0;
pool->width = pool->height = 0;
return ret;
}
static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
{
FramePool *pool = avctx->internal->pool;
int planes = pool->planes;
int i;
frame->linesize[0] = pool->linesize[0];
if (planes > AV_NUM_DATA_POINTERS) {
frame->extended_data = av_mallocz_array(planes, sizeof(*frame->extended_data));
frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
frame->extended_buf = av_mallocz_array(frame->nb_extended_buf,
sizeof(*frame->extended_buf));
if (!frame->extended_data || !frame->extended_buf) {
av_freep(&frame->extended_data);
av_freep(&frame->extended_buf);
return AVERROR(ENOMEM);
}
} else {
frame->extended_data = frame->data;
av_assert0(frame->nb_extended_buf == 0);
}
for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
if (!frame->buf[i])
goto fail;
frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
}
for (i = 0; i < frame->nb_extended_buf; i++) {
frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
if (!frame->extended_buf[i])
goto fail;
frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
}
if (avctx->debug & FF_DEBUG_BUFFERS)
av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
return 0;
fail:
av_frame_unref(frame);
return AVERROR(ENOMEM);
}
static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
{
FramePool *pool = s->internal->pool;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
int i;
if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) {
av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n");
return -1;
}
if (!desc) {
av_log(s, AV_LOG_ERROR,
"Unable to get pixel format descriptor for format %s\n",
av_get_pix_fmt_name(pic->format));
return AVERROR(EINVAL);
}
memset(pic->data, 0, sizeof(pic->data));
pic->extended_data = pic->data;
for (i = 0; i < 4 && pool->pools[i]; i++) {
pic->linesize[i] = pool->linesize[i];
pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
if (!pic->buf[i])
goto fail;
pic->data[i] = pic->buf[i]->data;
}
for (; i < AV_NUM_DATA_POINTERS; i++) {
pic->data[i] = NULL;
pic->linesize[i] = 0;
}
if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
avpriv_set_systematic_pal2((uint32_t *)pic->data[1], pic->format);
if (s->debug & FF_DEBUG_BUFFERS)
av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
return 0;
fail:
av_frame_unref(pic);
return AVERROR(ENOMEM);
}
int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
{
int ret;
if (avctx->hw_frames_ctx) {
ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
frame->width = avctx->coded_width;
frame->height = avctx->coded_height;
return ret;
}
if ((ret = update_frame_pool(avctx, frame)) < 0)
return ret;
switch (avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
return video_get_buffer(avctx, frame);
case AVMEDIA_TYPE_AUDIO:
return audio_get_buffer(avctx, frame);
default:
return -1;
}
}
static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame)
{
int size;
const uint8_t *side_metadata;
AVDictionary **frame_md = &frame->metadata;
side_metadata = av_packet_get_side_data(avpkt,
AV_PKT_DATA_STRINGS_METADATA, &size);
return av_packet_unpack_dictionary(side_metadata, size, frame_md);
}
int ff_init_buffer_info(AVCodecContext *avctx, AVFrame *frame)
{
const AVPacket *pkt = avctx->internal->last_pkt_props;
int i;
static const struct {
enum AVPacketSideDataType packet;
enum AVFrameSideDataType frame;
} sd[] = {
{ AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN },
{ AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX },
{ AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL },
{ AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D },
{ AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
{ AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA },
{ AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL },
};
if (pkt) {
frame->pts = pkt->pts;
#if FF_API_PKT_PTS
FF_DISABLE_DEPRECATION_WARNINGS
frame->pkt_pts = pkt->pts;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
frame->pkt_pos = pkt->pos;
frame->pkt_duration = pkt->duration;
frame->pkt_size = pkt->size;
for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
int size;
uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size);
if (packet_sd) {
AVFrameSideData *frame_sd = av_frame_new_side_data(frame,
sd[i].frame,
size);
if (!frame_sd)
return AVERROR(ENOMEM);
memcpy(frame_sd->data, packet_sd, size);
}
}
add_metadata_from_side_data(pkt, frame);
if (pkt->flags & AV_PKT_FLAG_DISCARD) {
frame->flags |= AV_FRAME_FLAG_DISCARD;
} else {
frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD);
}
}
frame->reordered_opaque = avctx->reordered_opaque;
if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED)
frame->color_primaries = avctx->color_primaries;
if (frame->color_trc == AVCOL_TRC_UNSPECIFIED)
frame->color_trc = avctx->color_trc;
if (frame->colorspace == AVCOL_SPC_UNSPECIFIED)
frame->colorspace = avctx->colorspace;
if (frame->color_range == AVCOL_RANGE_UNSPECIFIED)
frame->color_range = avctx->color_range;
if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED)
frame->chroma_location = avctx->chroma_sample_location;
switch (avctx->codec->type) {
case AVMEDIA_TYPE_VIDEO:
frame->format = avctx->pix_fmt;
if (!frame->sample_aspect_ratio.num)
frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
if (frame->width && frame->height &&
av_image_check_sar(frame->width, frame->height,
frame->sample_aspect_ratio) < 0) {
av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
frame->sample_aspect_ratio.num,
frame->sample_aspect_ratio.den);
frame->sample_aspect_ratio = (AVRational){ 0, 1 };
}
break;
case AVMEDIA_TYPE_AUDIO:
if (!frame->sample_rate)
frame->sample_rate = avctx->sample_rate;
if (frame->format < 0)
frame->format = avctx->sample_fmt;
if (!frame->channel_layout) {
if (avctx->channel_layout) {
if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
avctx->channels) {
av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
"configuration.\n");
return AVERROR(EINVAL);
}
frame->channel_layout = avctx->channel_layout;
} else {
if (avctx->channels > FF_SANE_NB_CHANNELS) {
av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
avctx->channels);
return AVERROR(ENOSYS);
}
}
}
frame->channels = avctx->channels;
break;
}
return 0;
}
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
{
return ff_init_buffer_info(avctx, frame);
}
static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame)
{
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
int i;
int num_planes = av_pix_fmt_count_planes(frame->format);
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
int flags = desc ? desc->flags : 0;
if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL))
num_planes = 2;
for (i = 0; i < num_planes; i++) {
av_assert0(frame->data[i]);
}
// For now do not enforce anything for palette of pseudopal formats
if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PSEUDOPAL))
num_planes = 2;
// For formats without data like hwaccel allow unused pointers to be non-NULL.
for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) {
if (frame->data[i])
av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n");
frame->data[i] = NULL;
}
}
}
static int get_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
{
const AVHWAccel *hwaccel = avctx->hwaccel;
int override_dimensions = 1;
int ret;
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
if ((ret = av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx)) < 0 || avctx->pix_fmt<0) {
av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
return AVERROR(EINVAL);
}
if (frame->width <= 0 || frame->height <= 0) {
frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres));
frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres));
override_dimensions = 0;
}
if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) {
av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n");
return AVERROR(EINVAL);
}
}
ret = ff_decode_frame_props(avctx, frame);
if (ret < 0)
return ret;
if (hwaccel) {
if (hwaccel->alloc_frame) {
ret = hwaccel->alloc_frame(avctx, frame);
goto end;
}
} else
avctx->sw_pix_fmt = avctx->pix_fmt;
ret = avctx->get_buffer2(avctx, frame, flags);
if (ret >= 0)
validate_avframe_allocation(avctx, frame);
end:
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions &&
!(avctx->codec->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) {
frame->width = avctx->width;
frame->height = avctx->height;
}
return ret;
}
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
{
int ret = get_buffer_internal(avctx, frame, flags);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
frame->width = frame->height = 0;
}
return ret;
}
static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame)
{
AVFrame *tmp;
int ret;
av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) {
av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n",
frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
av_frame_unref(frame);
}
ff_init_buffer_info(avctx, frame);
if (!frame->data[0])
return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
if (av_frame_is_writable(frame))
return ff_decode_frame_props(avctx, frame);
tmp = av_frame_alloc();
if (!tmp)
return AVERROR(ENOMEM);
av_frame_move_ref(tmp, frame);
ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
if (ret < 0) {
av_frame_free(&tmp);
return ret;
}
av_frame_copy(frame, tmp);
av_frame_free(&tmp);
return 0;
}
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
{
int ret = reget_buffer_internal(avctx, frame);
if (ret < 0)
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return ret;
}
void avcodec_flush_buffers(AVCodecContext *avctx)
{
avctx->internal->draining = 0;
avctx->internal->draining_done = 0;
avctx->internal->nb_draining_errors = 0;
av_frame_unref(avctx->internal->buffer_frame);
av_frame_unref(avctx->internal->compat_decode_frame);
av_packet_unref(avctx->internal->buffer_pkt);
avctx->internal->buffer_pkt_valid = 0;
av_packet_unref(avctx->internal->ds.in_pkt);
if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
ff_thread_flush(avctx);
else if (avctx->codec->flush)
avctx->codec->flush(avctx);
avctx->pts_correction_last_pts =
avctx->pts_correction_last_dts = INT64_MIN;
ff_decode_bsfs_uninit(avctx);
if (!avctx->refcounted_frames)
av_frame_unref(avctx->internal->to_free);
}
void ff_decode_bsfs_uninit(AVCodecContext *avctx)
{
DecodeFilterContext *s = &avctx->internal->filter;
int i;
for (i = 0; i < s->nb_bsfs; i++)
av_bsf_free(&s->bsfs[i]);
av_freep(&s->bsfs);
s->nb_bsfs = 0;
}
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