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FFmpeg/libavcodec/decode.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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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/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/emms.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/mastering_display_metadata.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "avcodec_internal.h"
#include "bytestream.h"
#include "bsf.h"
#include "codec_desc.h"
#include "codec_internal.h"
#include "decode.h"
#include "hwaccel_internal.h"
#include "hwconfig.h"
#include "internal.h"
#include "packet_internal.h"
#include "refstruct.h"
#include "thread.h"
typedef struct DecodeContext {
AVCodecInternal avci;
/* to prevent infinite loop on errors when draining */
int nb_draining_errors;
/**
* The caller has submitted a NULL packet on input.
*/
int draining_started;
int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
int64_t pts_correction_last_pts; /// PTS of the last frame
int64_t pts_correction_last_dts; /// DTS of the last frame
/**
* Bitmask indicating for which side data types we prefer user-supplied
* (global or attached to packets) side data over bytestream.
*/
uint64_t side_data_pref_mask;
} DecodeContext;
static DecodeContext *decode_ctx(AVCodecInternal *avci)
{
return (DecodeContext *)avci;
}
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 (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 FF_API_FRAME_PKT
if (!ret)
avci->last_pkt_props->stream_index = pkt->size; // Needed for ff_decode_frame_props().
#endif
}
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;
}
static int decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
{
AVCodecInternal *avci = avctx->internal;
int ret;
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;
}
int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
{
AVCodecInternal *avci = avctx->internal;
DecodeContext *dc = decode_ctx(avci);
if (avci->draining)
return AVERROR_EOF;
while (1) {
int ret = decode_get_packet(avctx, pkt);
if (ret == AVERROR(EAGAIN) &&
(!AVPACKET_IS_EMPTY(avci->buffer_pkt) || dc->draining_started)) {
ret = av_bsf_send_packet(avci->bsf, avci->buffer_pkt);
if (ret < 0) {
av_packet_unref(avci->buffer_pkt);
return ret;
}
continue;
}
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(DecodeContext *dc,
int64_t reordered_pts, int64_t dts)
{
int64_t pts = AV_NOPTS_VALUE;
if (dts != AV_NOPTS_VALUE) {
dc->pts_correction_num_faulty_dts += dts <= dc->pts_correction_last_dts;
dc->pts_correction_last_dts = dts;
} else if (reordered_pts != AV_NOPTS_VALUE)
dc->pts_correction_last_dts = reordered_pts;
if (reordered_pts != AV_NOPTS_VALUE) {
dc->pts_correction_num_faulty_pts += reordered_pts <= dc->pts_correction_last_pts;
dc->pts_correction_last_pts = reordered_pts;
} else if(dts != AV_NOPTS_VALUE)
dc->pts_correction_last_pts = dts;
if ((dc->pts_correction_num_faulty_pts<=dc->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
&& reordered_pts != AV_NOPTS_VALUE)
pts = reordered_pts;
else
pts = dts;
return pts;
}
static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
{
AVCodecInternal *avci = avctx->internal;
AVFrameSideData *side;
uint32_t discard_padding = 0;
uint8_t skip_reason = 0;
uint8_t discard_reason = 0;
side = av_frame_get_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES);
if (side && side->size >= 10) {
avci->skip_samples = AV_RL32(side->data);
avci->skip_samples = FFMAX(0, avci->skip_samples);
discard_padding = AV_RL32(side->data + 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->data + 8);
discard_reason = AV_RL8(side->data + 9);
}
if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
if (!side && (avci->skip_samples || discard_padding))
side = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10);
if (side && (avci->skip_samples || discard_padding)) {
AV_WL32(side->data, avci->skip_samples);
AV_WL32(side->data + 4, discard_padding);
AV_WL8(side->data + 8, skip_reason);
AV_WL8(side->data + 9, discard_reason);
avci->skip_samples = 0;
}
return 0;
}
av_frame_remove_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES);
if ((frame->flags & AV_FRAME_FLAG_DISCARD)) {
avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples);
*discarded_samples += frame->nb_samples;
return AVERROR(EAGAIN);
}
if (avci->skip_samples > 0) {
if (frame->nb_samples <= avci->skip_samples){
*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);
return AVERROR(EAGAIN);
} 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->duration >= diff_ts)
frame->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) {
if (discard_padding == frame->nb_samples) {
*discarded_samples += frame->nb_samples;
return AVERROR(EAGAIN);
} 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->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;
}
}
return 0;
}
/*
* 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, consumed;
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) {
consumed = ff_thread_decode_frame(avctx, frame, &got_frame, pkt);
} else {
consumed = 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 FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
if(!avctx->has_b_frames)
frame->pkt_pos = pkt->pos;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
}
}
emms_c();
if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
ret = (!got_frame || frame->flags & AV_FRAME_FLAG_DISCARD)
? AVERROR(EAGAIN)
: 0;
} else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
ret = !got_frame ? AVERROR(EAGAIN)
: discard_samples(avctx, frame, discarded_samples);
}
if (ret == AVERROR(EAGAIN))
av_frame_unref(frame);
// FF_CODEC_CB_TYPE_DECODE decoders must not return AVERROR EAGAIN
// code later will add AVERROR(EAGAIN) to a pointer
av_assert0(consumed != AVERROR(EAGAIN));
if (consumed < 0)
ret = consumed;
if (consumed >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO)
consumed = pkt->size;
if (!ret)
av_assert0(frame->buf[0]);
if (ret == AVERROR(EAGAIN))
ret = 0;
/* do not stop draining when got_frame != 0 or ret < 0 */
if (avci->draining && !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 (decode_ctx(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 (consumed >= pkt->size || ret < 0) {
av_packet_unref(pkt);
} else {
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)) {
#if FF_API_FRAME_PKT
// See extract_packet_props() comment.
avci->last_pkt_props->stream_index = avci->last_pkt_props->stream_index - consumed;
#endif
avci->last_pkt_props->pts = AV_NOPTS_VALUE;
avci->last_pkt_props->dts = AV_NOPTS_VALUE;
}
}
return ret;
}
#if CONFIG_LCMS2
static int detect_colorspace(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
enum AVColorTransferCharacteristic trc;
AVColorPrimariesDesc coeffs;
enum AVColorPrimaries prim;
cmsHPROFILE profile;
AVFrameSideData *sd;
int ret;
if (!(avctx->flags2 & AV_CODEC_FLAG2_ICC_PROFILES))
return 0;
sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
if (!sd || !sd->size)
return 0;
if (!avci->icc.avctx) {
ret = ff_icc_context_init(&avci->icc, avctx);
if (ret < 0)
return ret;
}
profile = cmsOpenProfileFromMemTHR(avci->icc.ctx, sd->data, sd->size);
if (!profile)
return AVERROR_INVALIDDATA;
ret = ff_icc_profile_sanitize(&avci->icc, profile);
if (!ret)
ret = ff_icc_profile_read_primaries(&avci->icc, profile, &coeffs);
if (!ret)
ret = ff_icc_profile_detect_transfer(&avci->icc, profile, &trc);
cmsCloseProfile(profile);
if (ret < 0)
return ret;
prim = av_csp_primaries_id_from_desc(&coeffs);
if (prim != AVCOL_PRI_UNSPECIFIED)
frame->color_primaries = prim;
if (trc != AVCOL_TRC_UNSPECIFIED)
frame->color_trc = trc;
return 0;
}
#else /* !CONFIG_LCMS2 */
static int detect_colorspace(av_unused AVCodecContext *c, av_unused AVFrame *f)
{
return 0;
}
#endif
static int fill_frame_props(const AVCodecContext *avctx, AVFrame *frame)
{
int ret;
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;
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt;
} else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
if (frame->format == AV_SAMPLE_FMT_NONE)
frame->format = avctx->sample_fmt;
if (!frame->ch_layout.nb_channels) {
ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout);
if (ret < 0)
return ret;
}
if (!frame->sample_rate)
frame->sample_rate = avctx->sample_rate;
}
return 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;
DecodeContext *dc = decode_ctx(avci);
const FFCodec *const codec = ffcodec(avctx->codec);
int ret, ok;
av_assert0(!frame->buf[0]);
if (codec->cb_type == FF_CODEC_CB_TYPE_RECEIVE_FRAME) {
ret = codec->cb.receive_frame(avctx, frame);
emms_c();
if (!ret) {
if (avctx->codec->type == AVMEDIA_TYPE_VIDEO)
ret = (frame->flags & AV_FRAME_FLAG_DISCARD) ? AVERROR(EAGAIN) : 0;
else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
int64_t discarded_samples = 0;
ret = discard_samples(avctx, frame, &discarded_samples);
}
}
} else
ret = decode_simple_receive_frame(avctx, frame);
if (ret == AVERROR_EOF)
avci->draining_done = 1;
/* preserve ret */
ok = detect_colorspace(avctx, frame);
if (ok < 0) {
av_frame_unref(frame);
return ok;
}
if (!ret) {
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
if (!frame->width)
frame->width = avctx->width;
if (!frame->height)
frame->height = avctx->height;
} else
frame->flags |= AV_FRAME_FLAG_KEY;
ret = fill_frame_props(avctx, frame);
if (ret < 0) {
av_frame_unref(frame);
return ret;
}
#if FF_API_FRAME_KEY
FF_DISABLE_DEPRECATION_WARNINGS
frame->key_frame = !!(frame->flags & AV_FRAME_FLAG_KEY);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
#if FF_API_INTERLACED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
frame->interlaced_frame = !!(frame->flags & AV_FRAME_FLAG_INTERLACED);
frame->top_field_first = !!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
frame->best_effort_timestamp = guess_correct_pts(dc,
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;
DecodeContext *dc = decode_ctx(avci);
int ret;
if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
return AVERROR(EINVAL);
if (dc->draining_started)
return AVERROR_EOF;
if (avpkt && !avpkt->size && avpkt->data)
return AVERROR(EINVAL);
if (avpkt && (avpkt->data || avpkt->side_data_elems)) {
if (!AVPACKET_IS_EMPTY(avci->buffer_pkt))
return AVERROR(EAGAIN);
ret = av_packet_ref(avci->buffer_pkt, avpkt);
if (ret < 0)
return ret;
} else
dc->draining_started = 1;
if (!avci->buffer_frame->buf[0] && !dc->draining_started) {
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);
}
// make sure frames returned to the caller are valid
static int frame_validate(AVCodecContext *avctx, AVFrame *frame)
{
if (!frame->buf[0] || frame->format < 0)
goto fail;
switch (avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (frame->width <= 0 || frame->height <= 0)
goto fail;
break;
case AVMEDIA_TYPE_AUDIO:
if (!av_channel_layout_check(&frame->ch_layout) ||
frame->sample_rate <= 0)
goto fail;
break;
default: av_assert0(0);
}
return 0;
fail:
av_log(avctx, AV_LOG_ERROR, "An invalid frame was output by a decoder. "
"This is a bug, please report it.\n");
return AVERROR_BUG;
}
int ff_decode_receive_frame(AVCodecContext *avctx, AVFrame *frame)
{
AVCodecInternal *avci = avctx->internal;
int ret;
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;
}
ret = frame_validate(avctx, frame);
if (ret < 0)
goto fail;
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
ret = apply_cropping(avctx, frame);
if (ret < 0)
goto fail;
}
avctx->frame_num++;
#if FF_API_DROPCHANGED
if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) {
if (avctx->frame_num == 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;
ret = av_channel_layout_copy(&avci->initial_ch_layout, &frame->ch_layout);
if (ret < 0)
goto fail;
break;
}
}
if (avctx->frame_num > 1) {
int 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:
changed |= avci->initial_sample_rate != frame->sample_rate ||
avci->initial_sample_rate != avctx->sample_rate ||
av_channel_layout_compare(&avci->initial_ch_layout, &frame->ch_layout);
break;
}
if (changed) {
avci->changed_frames_dropped++;
av_log(avctx, AV_LOG_INFO, "dropped changed frame #%"PRId64" pts %"PRId64
" drop count: %d \n",
avctx->frame_num, frame->pts,
avci->changed_frames_dropped);
ret = AVERROR_INPUT_CHANGED;
goto fail;
}
}
}
#endif
return 0;
fail:
av_frame_unref(frame);
return ret;
}
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, const AVPacket **outpkt,
const 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, const 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 (ffcodec(avctx->codec)->cb_type != FF_CODEC_CB_TYPE_DECODE_SUB) {
av_log(avctx, AV_LOG_ERROR, "Codec not subtitle decoder\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;
const 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_num++;
}
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 FFHWAccel *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);
if (!avctx->internal->hwaccel_priv_data) {
avctx->internal->hwaccel_priv_data =
av_mallocz(hwa->priv_data_size);
if (!avctx->internal->hwaccel_priv_data) {
av_buffer_unref(&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 FFHWAccel *hwaccel)
{
int err;
if (hwaccel->p.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->p.name);
return AVERROR_PATCHWELCOME;
}
if (!avctx->internal->hwaccel_priv_data && 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->p;
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(hwaccel->p.pix_fmt));
av_freep(&avctx->internal->hwaccel_priv_data);
avctx->hwaccel = NULL;
return err;
}
}
return 0;
}
void ff_hwaccel_uninit(AVCodecContext *avctx)
{
if (FF_HW_HAS_CB(avctx, uninit))
FF_HW_SIMPLE_CALL(avctx, uninit);
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.
ff_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 %s "
"initialisation.\n", desc->name, hw_config->hwaccel->p.name);
err = hwaccel_init(avctx, hw_config->hwaccel);
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;
}
if (ret < 0)
ff_hwaccel_uninit(avctx);
av_freep(&choices);
return ret;
}
const AVPacketSideData *ff_get_coded_side_data(const AVCodecContext *avctx,
enum AVPacketSideDataType type)
{
for (int i = 0; i < avctx->nb_coded_side_data; i++)
if (avctx->coded_side_data[i].type == type)
return &avctx->coded_side_data[i];
return NULL;
}
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_from_pkt(const AVCodecContext *avctx,
AVFrame *frame, const AVPacket *pkt)
{
static const struct {
enum AVPacketSideDataType packet;
enum AVFrameSideDataType frame;
} sd[] = {
{ AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC },
{ AV_PKT_DATA_AFD, AV_FRAME_DATA_AFD },
{ AV_PKT_DATA_DYNAMIC_HDR10_PLUS, AV_FRAME_DATA_DYNAMIC_HDR_PLUS },
{ AV_PKT_DATA_S12M_TIMECODE, AV_FRAME_DATA_S12M_TIMECODE },
{ AV_PKT_DATA_SKIP_SAMPLES, AV_FRAME_DATA_SKIP_SAMPLES },
};
frame->pts = pkt->pts;
frame->duration = pkt->duration;
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
frame->pkt_pos = pkt->pos;
frame->pkt_size = pkt->size;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
for (int i = 0; ff_sd_global_map[i].packet < AV_PKT_DATA_NB; i++) {
size_t size;
const uint8_t *packet_sd = av_packet_get_side_data(pkt, ff_sd_global_map[i].packet, &size);
if (packet_sd) {
AVFrameSideData *frame_sd;
frame_sd = av_frame_new_side_data(frame, ff_sd_global_map[i].frame, size);
if (!frame_sd)
return AVERROR(ENOMEM);
memcpy(frame_sd->data, packet_sd, 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);
}
if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
int ret = av_buffer_replace(&frame->opaque_ref, pkt->opaque_ref);
if (ret < 0)
return ret;
frame->opaque = pkt->opaque;
}
return 0;
}
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
{
int ret;
for (int i = 0; ff_sd_global_map[i].packet < AV_PKT_DATA_NB; i++) {
const AVPacketSideData *packet_sd = ff_get_coded_side_data(avctx,
ff_sd_global_map[i].packet);
if (packet_sd) {
AVFrameSideData *frame_sd = av_frame_new_side_data(frame,
ff_sd_global_map[i].frame,
packet_sd->size);
if (!frame_sd)
return AVERROR(ENOMEM);
memcpy(frame_sd->data, packet_sd->data, packet_sd->size);
}
}
if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
const AVPacket *pkt = avctx->internal->last_pkt_props;
ret = ff_decode_frame_props_from_pkt(avctx, frame, pkt);
if (ret < 0)
return ret;
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
frame->pkt_size = pkt->stream_index;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
}
ret = fill_frame_props(avctx, frame);
if (ret < 0)
return ret;
switch (avctx->codec->type) {
case AVMEDIA_TYPE_VIDEO:
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;
}
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 FFHWAccel *hwaccel = ffhwaccel(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 (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;
DecodeContext *dc = decode_ctx(avci);
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 (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
}
}
}
dc->pts_correction_num_faulty_pts =
dc->pts_correction_num_faulty_dts = 0;
dc->pts_correction_last_pts =
dc->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;
}
if (avctx->nb_side_data_prefer_packet == 1 &&
avctx->side_data_prefer_packet[0] == -1)
dc->side_data_pref_mask = ~0ULL;
else {
for (unsigned i = 0; i < avctx->nb_side_data_prefer_packet; i++) {
int val = avctx->side_data_prefer_packet[i];
if (val < 0 || val >= AV_PKT_DATA_NB) {
av_log(avctx, AV_LOG_ERROR, "Invalid side data type: %d\n", val);
return AVERROR(EINVAL);
}
for (unsigned j = 0; ff_sd_global_map[j].packet < AV_PKT_DATA_NB; j++) {
if (ff_sd_global_map[j].packet == val) {
val = ff_sd_global_map[j].frame;
// this code will need to be changed when we have more than
// 64 frame side data types
if (val >= 64) {
av_log(avctx, AV_LOG_ERROR, "Side data type too big\n");
return AVERROR_BUG;
}
dc->side_data_pref_mask |= 1ULL << val;
}
}
}
}
avci->in_pkt = av_packet_alloc();
avci->last_pkt_props = av_packet_alloc();
if (!avci->in_pkt || !avci->last_pkt_props)
return AVERROR(ENOMEM);
ret = decode_bsfs_init(avctx);
if (ret < 0)
return ret;
#if FF_API_DROPCHANGED
if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED)
av_log(avctx, AV_LOG_WARNING, "The dropchanged flag is deprecated.\n");
#endif
return 0;
}
/**
* Check side data preference and clear existing side data from frame
* if needed.
*
* @retval 0 side data of this type can be added to frame
* @retval 1 side data of this type should not be added to frame
*/
static int side_data_pref(const AVCodecContext *avctx, AVFrame *frame,
enum AVFrameSideDataType type)
{
DecodeContext *dc = decode_ctx(avctx->internal);
// Note: could be skipped for `type` without corresponding packet sd
if (av_frame_get_side_data(frame, type)) {
if (dc->side_data_pref_mask & (1ULL << type))
return 1;
av_frame_remove_side_data(frame, type);
}
return 0;
}
int ff_frame_new_side_data(const AVCodecContext *avctx, AVFrame *frame,
enum AVFrameSideDataType type, size_t size,
AVFrameSideData **psd)
{
AVFrameSideData *sd;
if (side_data_pref(avctx, frame, type)) {
if (psd)
*psd = NULL;
return 0;
}
sd = av_frame_new_side_data(frame, type, size);
if (psd)
*psd = sd;
return sd ? 0 : AVERROR(ENOMEM);
}
int ff_frame_new_side_data_from_buf(const AVCodecContext *avctx,
AVFrame *frame, enum AVFrameSideDataType type,
AVBufferRef **buf, AVFrameSideData **psd)
{
AVFrameSideData *sd = NULL;
int ret = 0;
if (side_data_pref(avctx, frame, type))
goto finish;
sd = av_frame_new_side_data_from_buf(frame, type, *buf);
if (sd)
*buf = NULL;
else
ret = AVERROR(ENOMEM);
finish:
av_buffer_unref(buf);
if (psd)
*psd = sd;
return ret;
}
int ff_decode_mastering_display_new(const AVCodecContext *avctx, AVFrame *frame,
AVMasteringDisplayMetadata **mdm)
{
if (side_data_pref(avctx, frame, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA)) {
*mdm = NULL;
return 0;
}
*mdm = av_mastering_display_metadata_create_side_data(frame);
return *mdm ? 0 : AVERROR(ENOMEM);
}
int ff_decode_content_light_new(const AVCodecContext *avctx, AVFrame *frame,
AVContentLightMetadata **clm)
{
if (side_data_pref(avctx, frame, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL)) {
*clm = NULL;
return 0;
}
*clm = av_content_light_metadata_create_side_data(frame);
return *clm ? 0 : AVERROR(ENOMEM);
}
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;
}
int ff_hwaccel_frame_priv_alloc(AVCodecContext *avctx, void **hwaccel_picture_private)
{
const FFHWAccel *hwaccel = ffhwaccel(avctx->hwaccel);
if (!hwaccel || !hwaccel->frame_priv_data_size)
return 0;
av_assert0(!*hwaccel_picture_private);
if (hwaccel->free_frame_priv) {
AVHWFramesContext *frames_ctx;
if (!avctx->hw_frames_ctx)
return AVERROR(EINVAL);
frames_ctx = (AVHWFramesContext *) avctx->hw_frames_ctx->data;
*hwaccel_picture_private = ff_refstruct_alloc_ext(hwaccel->frame_priv_data_size, 0,
frames_ctx->device_ctx,
hwaccel->free_frame_priv);
} else {
*hwaccel_picture_private = ff_refstruct_allocz(hwaccel->frame_priv_data_size);
}
if (!*hwaccel_picture_private)
return AVERROR(ENOMEM);
return 0;
}
void ff_decode_flush_buffers(AVCodecContext *avctx)
{
AVCodecInternal *avci = avctx->internal;
DecodeContext *dc = decode_ctx(avci);
av_packet_unref(avci->last_pkt_props);
av_packet_unref(avci->in_pkt);
dc->pts_correction_last_pts =
dc->pts_correction_last_dts = INT64_MIN;
av_bsf_flush(avci->bsf);
dc->nb_draining_errors = 0;
dc->draining_started = 0;
}
AVCodecInternal *ff_decode_internal_alloc(void)
{
return av_mallocz(sizeof(DecodeContext));
}
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