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FFmpeg/libavcodec/decode.c
Andreas Rheinhardt c19797bf59 avcodec/internal: Hide stuff only used by the core decode API 
The general decoding API uses bitstream filters and an AVFifo
and therefore AVCodecInternal contains pointers to an AVBSFContext
and to an AVFifo and lavc/internal.h includes lavc/bsf.h and
lavu/fifo.h.
Yet actually, only two files are supposed to use these, namely
avcodec.c and (mainly) decode.c. For all the other files,
it should be an opaque type that they should not touch and that
they need not know anything about. This can be achieved by not
including these headers and using the structs instead of the
corresponding typedefs.
This also forces translation units that really use the BSF
and the FIFO APIs themselves to include the relevant headers
directly instead of relying on indirect inclusions (up until now,
even avcodec.c and decode.c relied on fifo.h to be included
by internal.h).
Of course, it also avoids unnecessary rebuilds when bsf.h or fifo.h
change.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-05-12 08:52:59 +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/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/fifo.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intmath.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "bytestream.h"
#include "bsf.h"
#include "codec_internal.h"
#include "decode.h"
#include "hwconfig.h"
#include "internal.h"
#include "thread.h"
static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt)
{
int ret;
size_t size;
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 FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
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;
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
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;
}
#define IS_EMPTY(pkt) (!(pkt)->data)
static int copy_packet_props(AVPacket *dst, const AVPacket *src)
{
int ret = av_packet_copy_props(dst, src);
if (ret < 0)
return ret;
dst->size = src->size; // HACK: Needed for ff_decode_frame_props().
dst->data = (void*)1; // HACK: Needed for IS_EMPTY().
return 0;
}
static int extract_packet_props(AVCodecInternal *avci, const AVPacket *pkt)
{
AVPacket tmp = { 0 };
int ret = 0;
if (IS_EMPTY(avci->last_pkt_props)) {
if (av_fifo_read(avci->pkt_props, avci->last_pkt_props, 1) < 0)
return copy_packet_props(avci->last_pkt_props, pkt);
}
ret = copy_packet_props(&tmp, pkt);
if (ret < 0)
return ret;
ret = av_fifo_write(avci->pkt_props, &tmp, 1);
if (ret < 0)
av_packet_unref(&tmp);
return ret;
}
static int decode_bsfs_init(AVCodecContext *avctx)
{
AVCodecInternal *avci = avctx->internal;
const FFCodec *const codec = ffcodec(avctx->codec);
int ret;
if (avci->bsf)
return 0;
ret = av_bsf_list_parse_str(codec->bsfs, &avci->bsf);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error parsing decoder bitstream filters '%s': %s\n", codec->bsfs, av_err2str(ret));
if (ret != AVERROR(ENOMEM))
ret = AVERROR_BUG;
goto fail;
}
/* 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) */
avci->bsf->time_base_in = (AVRational){ 1, 90000 };
ret = avcodec_parameters_from_context(avci->bsf->par_in, avctx);
if (ret < 0)
goto fail;
ret = av_bsf_init(avci->bsf);
if (ret < 0)
goto fail;
return 0;
fail:
av_bsf_free(&avci->bsf);
return ret;
}
int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
{
AVCodecInternal *avci = avctx->internal;
int ret;
if (avci->draining)
return AVERROR_EOF;
ret = av_bsf_receive_packet(avci->bsf, pkt);
if (ret == AVERROR_EOF)
avci->draining = 1;
if (ret < 0)
return ret;
if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
ret = extract_packet_props(avctx->internal, pkt);
if (ret < 0)
goto finish;
}
ret = apply_param_change(avctx, pkt);
if (ret < 0)
goto finish;
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 inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
{
AVCodecInternal *avci = avctx->internal;
AVPacket *const pkt = avci->in_pkt;
const FFCodec *const codec = ffcodec(avctx->codec);
int got_frame, actual_got_frame;
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;
got_frame = 0;
if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) {
ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt);
} else {
ret = codec->cb.decode(avctx, frame, &got_frame, pkt);
if (!(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;
} else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
uint8_t *side;
size_t side_size;
uint32_t discard_padding = 0;
uint8_t skip_reason = 0;
uint8_t discard_reason = 0;
if (ret >= 0 && got_frame) {
if (frame->format == AV_SAMPLE_FMT_NONE)
frame->format = avctx->sample_fmt;
if (!frame->ch_layout.nb_channels) {
int ret2 = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout);
if (ret2 < 0) {
ret = ret2;
got_frame = 0;
}
}
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
if (!frame->channel_layout)
frame->channel_layout = avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
avctx->ch_layout.u.mask : 0;
if (!frame->channels)
frame->channels = avctx->ch_layout.nb_channels;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
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) {
avci->skip_samples = AV_RL32(side) * avci->skip_samples_multiplier;
avci->skip_samples = FFMAX(0, avci->skip_samples);
discard_padding = AV_RL32(side + 4);
av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n",
avci->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)) {
avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples);
got_frame = 0;
*discarded_samples += frame->nb_samples;
}
if (avci->skip_samples > 0 && got_frame &&
!(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
if(frame->nb_samples <= avci->skip_samples){
got_frame = 0;
*discarded_samples += frame->nb_samples;
avci->skip_samples -= frame->nb_samples;
av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
avci->skip_samples);
} else {
av_samples_copy(frame->extended_data, frame->extended_data, 0, avci->skip_samples,
frame->nb_samples - avci->skip_samples, avctx->ch_layout.nb_channels, frame->format);
if(avctx->pkt_timebase.num && avctx->sample_rate) {
int64_t diff_ts = av_rescale_q(avci->skip_samples,
(AVRational){1, avctx->sample_rate},
avctx->pkt_timebase);
if(frame->pts!=AV_NOPTS_VALUE)
frame->pts += diff_ts;
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",
avci->skip_samples, frame->nb_samples);
*discarded_samples += avci->skip_samples;
frame->nb_samples -= avci->skip_samples;
avci->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) {
*discarded_samples += 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, avci->skip_samples);
AV_WL32(fside->data + 4, discard_padding);
AV_WL8(fside->data + 8, skip_reason);
AV_WL8(fside->data + 9, discard_reason);
avci->skip_samples = 0;
}
}
}
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 FF_API_FLAG_TRUNCATED
if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED))
#else
if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO)
#endif
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 (avci->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;
}
}
if (ret >= pkt->size || ret < 0) {
av_packet_unref(pkt);
av_packet_unref(avci->last_pkt_props);
} else {
int consumed = ret;
pkt->data += consumed;
pkt->size -= consumed;
pkt->pts = AV_NOPTS_VALUE;
pkt->dts = AV_NOPTS_VALUE;
if (!(codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment.
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;
int64_t discarded_samples = 0;
while (!frame->buf[0]) {
if (discarded_samples > avctx->max_samples)
return AVERROR(EAGAIN);
ret = decode_simple_internal(avctx, frame, &discarded_samples);
if (ret < 0)
return ret;
}
return 0;
}
static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
const FFCodec *const codec = ffcodec(avctx->codec);
int ret;
av_assert0(!frame->buf[0]);
if (codec->cb_type == FF_CODEC_CB_TYPE_RECEIVE_FRAME) {
ret = codec->cb.receive_frame(avctx, frame);
if (ret != AVERROR(EAGAIN))
av_packet_unref(avci->last_pkt_props);
} else
ret = decode_simple_receive_frame(avctx, frame);
if (ret == AVERROR_EOF)
avci->draining_done = 1;
if (!(codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS) &&
IS_EMPTY(avci->last_pkt_props)) {
// May fail if the FIFO is empty.
av_fifo_read(avci->pkt_props, avci->last_pkt_props, 1);
}
if (!ret) {
frame->best_effort_timestamp = guess_correct_pts(avctx,
frame->pts,
frame->pkt_dts);
/* the only case where decode data is not set should be decoders
* that do not call ff_get_buffer() */
av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) ||
!(avctx->codec->capabilities & AV_CODEC_CAP_DR1));
if (frame->private_ref) {
FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data;
if (fdd->post_process) {
ret = fdd->post_process(avctx, frame);
if (ret < 0) {
av_frame_unref(frame);
return ret;
}
}
}
}
/* free the per-frame decode data */
av_buffer_unref(&frame->private_ref);
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);
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->bsf, 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 apply_cropping(AVCodecContext *avctx, AVFrame *frame)
{
/* 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;
return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ?
AV_FRAME_CROP_UNALIGNED : 0);
}
int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
int ret, changed;
av_frame_unref(frame);
if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
return AVERROR(EINVAL);
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++;
if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) {
if (avctx->frame_number == 1) {
avci->initial_format = frame->format;
switch(avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
avci->initial_width = frame->width;
avci->initial_height = frame->height;
break;
case AVMEDIA_TYPE_AUDIO:
avci->initial_sample_rate = frame->sample_rate ? frame->sample_rate :
avctx->sample_rate;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
avci->initial_channels = frame->ch_layout.nb_channels;
avci->initial_channel_layout = frame->channel_layout;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
ret = av_channel_layout_copy(&avci->initial_ch_layout, &frame->ch_layout);
if (ret < 0) {
av_frame_unref(frame);
return ret;
}
break;
}
}
if (avctx->frame_number > 1) {
changed = avci->initial_format != frame->format;
switch(avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
changed |= avci->initial_width != frame->width ||
avci->initial_height != frame->height;
break;
case AVMEDIA_TYPE_AUDIO:
FF_DISABLE_DEPRECATION_WARNINGS
changed |= avci->initial_sample_rate != frame->sample_rate ||
avci->initial_sample_rate != avctx->sample_rate ||
#if FF_API_OLD_CHANNEL_LAYOUT
avci->initial_channels != frame->channels ||
avci->initial_channel_layout != frame->channel_layout ||
#endif
av_channel_layout_compare(&avci->initial_ch_layout, &frame->ch_layout);
FF_ENABLE_DEPRECATION_WARNINGS
break;
}
if (changed) {
avci->changed_frames_dropped++;
av_log(avctx, AV_LOG_INFO, "dropped changed frame #%d pts %"PRId64
" drop count: %d \n",
avctx->frame_number, frame->pts,
avci->changed_frames_dropped);
av_frame_unref(frame);
return AVERROR_INPUT_CHANGED;
}
}
}
return 0;
}
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,
AVPacket *inpkt, AVPacket *buf_pkt)
{
#if CONFIG_ICONV
iconv_t cd = (iconv_t)-1;
int ret = 0;
char *inb, *outb;
size_t inl, outl;
#endif
if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0) {
*outpkt = inpkt;
return 0;
}
#if CONFIG_ICONV
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");
return AVERROR(ERANGE);
}
cd = iconv_open("UTF-8", avctx->sub_charenc);
av_assert0(cd != (iconv_t)-1);
ret = av_new_packet(buf_pkt, inl * UTF8_MAX_BYTES);
if (ret < 0)
goto end;
ret = av_packet_copy_props(buf_pkt, inpkt);
if (ret < 0)
goto end;
outb = buf_pkt->data;
outl = buf_pkt->size;
if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
outl >= buf_pkt->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);
goto end;
}
buf_pkt->size -= outl;
memset(buf_pkt->data + buf_pkt->size, 0, outl);
*outpkt = buf_pkt;
ret = 0;
end:
if (ret < 0)
av_packet_unref(buf_pkt);
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;
}
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
int *got_sub_ptr,
AVPacket *avpkt)
{
int ret = 0;
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) {
AVCodecInternal *avci = avctx->internal;
AVPacket *pkt;
ret = recode_subtitle(avctx, &pkt, avpkt, avci->buffer_pkt);
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 = ffcodec(avctx->codec)->cb.decode_sub(avctx, sub, got_sub_ptr, pkt);
if (pkt == avci->buffer_pkt) // did we recode?
av_packet_unref(avci->buffer_pkt);
if (ret < 0) {
*got_sub_ptr = 0;
avsubtitle_free(sub);
return ret;
}
av_assert1(!sub->num_rects || *got_sub_ptr);
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 (unsigned i = 0; i < sub->num_rects; i++) {
if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_IGNORE &&
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);
*got_sub_ptr = 0;
return AVERROR_INVALIDDATA;
}
}
if (*got_sub_ptr)
avctx->frame_number++;
}
return ret;
}
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx,
const enum AVPixelFormat *fmt)
{
const AVPixFmtDescriptor *desc;
const AVCodecHWConfig *config;
int i, n;
// If a device was supplied when the codec was opened, assume that the
// user wants to use it.
if (avctx->hw_device_ctx && ffcodec(avctx->codec)->hw_configs) {
AVHWDeviceContext *device_ctx =
(AVHWDeviceContext*)avctx->hw_device_ctx->data;
for (i = 0;; i++) {
config = &ffcodec(avctx->codec)->hw_configs[i]->public;
if (!config)
break;
if (!(config->methods &
AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
continue;
if (device_ctx->type != config->device_type)
continue;
for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
if (config->pix_fmt == fmt[n])
return fmt[n];
}
}
}
// No device or other setup, so we have to choose from things which
// don't any other external information.
// If the last element of the list is a software format, choose it
// (this should be best software format if any exist).
for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
desc = av_pix_fmt_desc_get(fmt[n - 1]);
if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
return fmt[n - 1];
// Finally, traverse the list in order and choose the first entry
// with no external dependencies (if there is no hardware configuration
// information available then this just picks the first entry).
for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
for (i = 0;; i++) {
config = avcodec_get_hw_config(avctx->codec, i);
if (!config)
break;
if (config->pix_fmt == fmt[n])
break;
}
if (!config) {
// No specific config available, so the decoder must be able
// to handle this format without any additional setup.
return fmt[n];
}
if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
// Usable with only internal setup.
return fmt[n];
}
}
// Nothing is usable, give up.
return AV_PIX_FMT_NONE;
}
int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
enum AVHWDeviceType dev_type)
{
AVHWDeviceContext *device_ctx;
AVHWFramesContext *frames_ctx;
int ret;
if (!avctx->hwaccel)
return AVERROR(ENOSYS);
if (avctx->hw_frames_ctx)
return 0;
if (!avctx->hw_device_ctx) {
av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is "
"required for hardware accelerated decoding.\n");
return AVERROR(EINVAL);
}
device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data;
if (device_ctx->type != dev_type) {
av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware "
"decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type),
av_hwdevice_get_type_name(device_ctx->type));
return AVERROR(EINVAL);
}
ret = avcodec_get_hw_frames_parameters(avctx,
avctx->hw_device_ctx,
avctx->hwaccel->pix_fmt,
&avctx->hw_frames_ctx);
if (ret < 0)
return ret;
frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
if (frames_ctx->initial_pool_size) {
// We guarantee 4 base work surfaces. The function above guarantees 1
// (the absolute minimum), so add the missing count.
frames_ctx->initial_pool_size += 3;
}
ret = av_hwframe_ctx_init(avctx->hw_frames_ctx);
if (ret < 0) {
av_buffer_unref(&avctx->hw_frames_ctx);
return ret;
}
return 0;
}
int avcodec_get_hw_frames_parameters(AVCodecContext *avctx,
AVBufferRef *device_ref,
enum AVPixelFormat hw_pix_fmt,
AVBufferRef **out_frames_ref)
{
AVBufferRef *frames_ref = NULL;
const AVCodecHWConfigInternal *hw_config;
const AVHWAccel *hwa;
int i, ret;
for (i = 0;; i++) {
hw_config = ffcodec(avctx->codec)->hw_configs[i];
if (!hw_config)
return AVERROR(ENOENT);
if (hw_config->public.pix_fmt == hw_pix_fmt)
break;
}
hwa = hw_config->hwaccel;
if (!hwa || !hwa->frame_params)
return AVERROR(ENOENT);
frames_ref = av_hwframe_ctx_alloc(device_ref);
if (!frames_ref)
return AVERROR(ENOMEM);
ret = hwa->frame_params(avctx, frames_ref);
if (ret >= 0) {
AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data;
if (frames_ctx->initial_pool_size) {
// If the user has requested that extra output surfaces be
// available then add them here.
if (avctx->extra_hw_frames > 0)
frames_ctx->initial_pool_size += avctx->extra_hw_frames;
// If frame threading is enabled then an extra surface per thread
// is also required.
if (avctx->active_thread_type & FF_THREAD_FRAME)
frames_ctx->initial_pool_size += avctx->thread_count;
}
*out_frames_ref = frames_ref;
} else {
av_buffer_unref(&frames_ref);
}
return ret;
}
static int hwaccel_init(AVCodecContext *avctx,
const AVCodecHWConfigInternal *hw_config)
{
const AVHWAccel *hwaccel;
int err;
hwaccel = hw_config->hwaccel;
if (hwaccel->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL &&
avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n",
hwaccel->name);
return AVERROR_PATCHWELCOME;
}
if (hwaccel->priv_data_size) {
avctx->internal->hwaccel_priv_data =
av_mallocz(hwaccel->priv_data_size);
if (!avctx->internal->hwaccel_priv_data)
return AVERROR(ENOMEM);
}
avctx->hwaccel = hwaccel;
if (hwaccel->init) {
err = hwaccel->init(avctx);
if (err < 0) {
av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: "
"hwaccel initialisation returned error.\n",
av_get_pix_fmt_name(hw_config->public.pix_fmt));
av_freep(&avctx->internal->hwaccel_priv_data);
avctx->hwaccel = NULL;
return err;
}
}
return 0;
}
static void hwaccel_uninit(AVCodecContext *avctx)
{
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);
}
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
{
const AVPixFmtDescriptor *desc;
enum AVPixelFormat *choices;
enum AVPixelFormat ret, user_choice;
const AVCodecHWConfigInternal *hw_config;
const AVCodecHWConfig *config;
int i, n, err;
// Find end of list.
for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
// Must contain at least one entry.
av_assert0(n >= 1);
// If a software format is available, it must be the last entry.
desc = av_pix_fmt_desc_get(fmt[n - 1]);
if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) {
// No software format is available.
} else {
avctx->sw_pix_fmt = fmt[n - 1];
}
choices = av_memdup(fmt, (n + 1) * sizeof(*choices));
if (!choices)
return AV_PIX_FMT_NONE;
for (;;) {
// Remove the previous hwaccel, if there was one.
hwaccel_uninit(avctx);
user_choice = avctx->get_format(avctx, choices);
if (user_choice == AV_PIX_FMT_NONE) {
// Explicitly chose nothing, give up.
ret = AV_PIX_FMT_NONE;
break;
}
desc = av_pix_fmt_desc_get(user_choice);
if (!desc) {
av_log(avctx, AV_LOG_ERROR, "Invalid format returned by "
"get_format() callback.\n");
ret = AV_PIX_FMT_NONE;
break;
}
av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n",
desc->name);
for (i = 0; i < n; i++) {
if (choices[i] == user_choice)
break;
}
if (i == n) {
av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): "
"%s not in possible list.\n", desc->name);
ret = AV_PIX_FMT_NONE;
break;
}
if (ffcodec(avctx->codec)->hw_configs) {
for (i = 0;; i++) {
hw_config = ffcodec(avctx->codec)->hw_configs[i];
if (!hw_config)
break;
if (hw_config->public.pix_fmt == user_choice)
break;
}
} else {
hw_config = NULL;
}
if (!hw_config) {
// No config available, so no extra setup required.
ret = user_choice;
break;
}
config = &hw_config->public;
if (config->methods &
AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
avctx->hw_frames_ctx) {
const AVHWFramesContext *frames_ctx =
(AVHWFramesContext*)avctx->hw_frames_ctx->data;
if (frames_ctx->format != user_choice) {
av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
"does not match the format of the provided frames "
"context.\n", desc->name);
goto try_again;
}
} else if (config->methods &
AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX &&
avctx->hw_device_ctx) {
const AVHWDeviceContext *device_ctx =
(AVHWDeviceContext*)avctx->hw_device_ctx->data;
if (device_ctx->type != config->device_type) {
av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
"does not match the type of the provided device "
"context.\n", desc->name);
goto try_again;
}
} else if (config->methods &
AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
// Internal-only setup, no additional configuration.
} else if (config->methods &
AV_CODEC_HW_CONFIG_METHOD_AD_HOC) {
// Some ad-hoc configuration we can't see and can't check.
} else {
av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
"missing configuration.\n", desc->name);
goto try_again;
}
if (hw_config->hwaccel) {
av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel "
"initialisation.\n", desc->name);
err = hwaccel_init(avctx, hw_config);
if (err < 0)
goto try_again;
}
ret = user_choice;
break;
try_again:
av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying "
"get_format() without it.\n", desc->name);
for (i = 0; i < n; i++) {
if (choices[i] == user_choice)
break;
}
for (; i + 1 < n; i++)
choices[i] = choices[i + 1];
--n;
}
av_freep(&choices);
return ret;
}
static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame)
{
size_t 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_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
{
AVPacket *pkt = avctx->internal->last_pkt_props;
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 },
{ AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC },
{ AV_PKT_DATA_ICC_PROFILE, AV_FRAME_DATA_ICC_PROFILE },
{ AV_PKT_DATA_S12M_TIMECODE, AV_FRAME_DATA_S12M_TIMECODE },
{ AV_PKT_DATA_DYNAMIC_HDR10_PLUS, AV_FRAME_DATA_DYNAMIC_HDR_PLUS },
};
if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
frame->pts = pkt->pts;
frame->pkt_pos = pkt->pos;
frame->pkt_duration = pkt->duration;
frame->pkt_size = pkt->size;
for (int i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
size_t 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->ch_layout.nb_channels) {
int ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout);
if (ret < 0)
return ret;
}
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
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
break;
}
return 0;
}
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 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 void decode_data_free(void *opaque, uint8_t *data)
{
FrameDecodeData *fdd = (FrameDecodeData*)data;
if (fdd->post_process_opaque_free)
fdd->post_process_opaque_free(fdd->post_process_opaque);
if (fdd->hwaccel_priv_free)
fdd->hwaccel_priv_free(fdd->hwaccel_priv);
av_freep(&fdd);
}
int ff_attach_decode_data(AVFrame *frame)
{
AVBufferRef *fdd_buf;
FrameDecodeData *fdd;
av_assert1(!frame->private_ref);
av_buffer_unref(&frame->private_ref);
fdd = av_mallocz(sizeof(*fdd));
if (!fdd)
return AVERROR(ENOMEM);
fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free,
NULL, AV_BUFFER_FLAG_READONLY);
if (!fdd_buf) {
av_freep(&fdd);
return AVERROR(ENOMEM);
}
frame->private_ref = fdd_buf;
return 0;
}
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
{
const AVHWAccel *hwaccel = avctx->hwaccel;
int override_dimensions = 1;
int ret;
av_assert0(av_codec_is_decoder(avctx->codec));
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
if ((unsigned)avctx->width > INT_MAX - STRIDE_ALIGN ||
(ret = av_image_check_size2(FFALIGN(avctx->width, STRIDE_ALIGN), 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");
ret = AVERROR(EINVAL);
goto fail;
}
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");
ret = AVERROR(EINVAL);
goto fail;
}
} else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
/* compat layer for old-style get_buffer() implementations */
avctx->channels = avctx->ch_layout.nb_channels;
avctx->channel_layout = (avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) ?
avctx->ch_layout.u.mask : 0;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (frame->nb_samples * (int64_t)avctx->ch_layout.nb_channels > avctx->max_samples) {
av_log(avctx, AV_LOG_ERROR, "samples per frame %d, exceeds max_samples %"PRId64"\n", frame->nb_samples, avctx->max_samples);
ret = AVERROR(EINVAL);
goto fail;
}
}
ret = ff_decode_frame_props(avctx, frame);
if (ret < 0)
goto fail;
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)
goto fail;
validate_avframe_allocation(avctx, frame);
ret = ff_attach_decode_data(frame);
if (ret < 0)
goto fail;
end:
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions &&
!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) {
frame->width = avctx->width;
frame->height = avctx->height;
}
fail:
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
av_frame_unref(frame);
}
return ret;
}
static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
{
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);
}
if (!frame->data[0])
return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
if ((flags & FF_REGET_BUFFER_FLAG_READONLY) || 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 flags)
{
int ret = reget_buffer_internal(avctx, frame, flags);
if (ret < 0)
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return ret;
}
int ff_decode_preinit(AVCodecContext *avctx)
{
AVCodecInternal *avci = avctx->internal;
int ret = 0;
/* if the decoder init function was already called previously,
* free the already allocated subtitle_header before overwriting it */
av_freep(&avctx->subtitle_header);
#if FF_API_THREAD_SAFE_CALLBACKS
FF_DISABLE_DEPRECATION_WARNINGS
if ((avctx->thread_type & FF_THREAD_FRAME) &&
avctx->get_buffer2 != avcodec_default_get_buffer2 &&
!avctx->thread_safe_callbacks) {
av_log(avctx, AV_LOG_WARNING, "Requested frame threading with a "
"custom get_buffer2() implementation which is not marked as "
"thread safe. This is not supported anymore, make your "
"callback thread-safe.\n");
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && avctx->ch_layout.nb_channels == 0 &&
!(avctx->codec->capabilities & AV_CODEC_CAP_CHANNEL_CONF)) {
av_log(avctx, AV_LOG_ERROR, "Decoder requires channel count but channels not set\n");
return AVERROR(EINVAL);
}
if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
avctx->codec->max_lowres);
avctx->lowres = avctx->codec->max_lowres;
}
if (avctx->sub_charenc) {
if (avctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
av_log(avctx, AV_LOG_ERROR, "Character encoding is only "
"supported with subtitles codecs\n");
return AVERROR(EINVAL);
} else if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) {
av_log(avctx, AV_LOG_WARNING, "Codec '%s' is bitmap-based, "
"subtitles character encoding will be ignored\n",
avctx->codec_descriptor->name);
avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING;
} else {
/* input character encoding is set for a text based subtitle
* codec at this point */
if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_AUTOMATIC)
avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER;
if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_PRE_DECODER) {
#if CONFIG_ICONV
iconv_t cd = iconv_open("UTF-8", avctx->sub_charenc);
if (cd == (iconv_t)-1) {
ret = AVERROR(errno);
av_log(avctx, AV_LOG_ERROR, "Unable to open iconv context "
"with input character encoding \"%s\"\n", avctx->sub_charenc);
return ret;
}
iconv_close(cd);
#else
av_log(avctx, AV_LOG_ERROR, "Character encoding subtitles "
"conversion needs a libavcodec built with iconv support "
"for this codec\n");
return AVERROR(ENOSYS);
#endif
}
}
}
avctx->pts_correction_num_faulty_pts =
avctx->pts_correction_num_faulty_dts = 0;
avctx->pts_correction_last_pts =
avctx->pts_correction_last_dts = INT64_MIN;
if ( !CONFIG_GRAY && avctx->flags & AV_CODEC_FLAG_GRAY
&& avctx->codec_descriptor->type == AVMEDIA_TYPE_VIDEO)
av_log(avctx, AV_LOG_WARNING,
"gray decoding requested but not enabled at configuration time\n");
if (avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) {
avctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
}
avci->in_pkt = av_packet_alloc();
avci->last_pkt_props = av_packet_alloc();
avci->pkt_props = av_fifo_alloc2(1, sizeof(*avci->last_pkt_props),
AV_FIFO_FLAG_AUTO_GROW);
if (!avci->in_pkt || !avci->last_pkt_props || !avci->pkt_props)
return AVERROR(ENOMEM);
ret = decode_bsfs_init(avctx);
if (ret < 0)
return ret;
return 0;
}
int ff_copy_palette(void *dst, const AVPacket *src, void *logctx)
{
size_t size;
const void *pal = av_packet_get_side_data(src, AV_PKT_DATA_PALETTE, &size);
if (pal && size == AVPALETTE_SIZE) {
memcpy(dst, pal, AVPALETTE_SIZE);
return 1;
} else if (pal) {
av_log(logctx, AV_LOG_ERROR,
"Palette size %"SIZE_SPECIFIER" is wrong\n", size);
}
return 0;
}
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