* [FFmpeg-devel] [PATCH v3 1/3] avcodec/decode: move processing discard samples to its own function
@ 2023-07-10 21:54 James Almer
2023-07-10 21:54 ` [FFmpeg-devel] [PATCH v3 2/3] avcodec/decode: fill missing frame fields for all decoders James Almer
2023-07-10 21:54 ` [FFmpeg-devel] [PATCH 3/3] avcodec/decode: prevent discarding skip_samples side data if the decoder didn't generate a frame James Almer
0 siblings, 2 replies; 3+ messages in thread
From: James Almer @ 2023-07-10 21:54 UTC (permalink / raw)
To: ffmpeg-devel
Signed-off-by: James Almer <jamrial@gmail.com>
---
libavcodec/decode.c | 270 +++++++++++++++++++++++---------------------
1 file changed, 140 insertions(+), 130 deletions(-)
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index a47abeca06..c9da8f685c 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -289,6 +289,123 @@ static int64_t guess_correct_pts(AVCodecContext *ctx,
return pts;
}
+static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
+{
+ AVCodecInternal *avci = avctx->internal;
+ int ret = 0;
+ uint8_t *side;
+ size_t side_size;
+ uint32_t discard_padding = 0;
+ uint8_t skip_reason = 0;
+ uint8_t discard_reason = 0;
+
+ 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 = 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->buf[0])
+ return AVERROR(EAGAIN);
+
+ 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;
+ }
+ }
+#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;
+
+ if ((frame->flags & AV_FRAME_FLAG_DISCARD) &&
+ !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
+ avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples);
+ *discarded_samples += frame->nb_samples;
+ return AVERROR(EAGAIN);
+ }
+
+ if (avci->skip_samples > 0 &&
+ !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
+ 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 &&
+ !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
+ 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;
+ }
+ }
+
+ if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
+ 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;
+ }
+ }
+
+ return ret;
+}
+
/*
* The core of the receive_frame_wrapper for the decoders implementing
* the simple API. Certain decoders might consume partial packets without
@@ -300,7 +417,7 @@ static inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame,
AVCodecInternal *avci = avctx->internal;
AVPacket *const pkt = avci->in_pkt;
const FFCodec *const codec = ffcodec(avctx->codec);
- int got_frame, actual_got_frame;
+ int got_frame, consumed;
int ret;
if (!pkt->data && !avci->draining) {
@@ -323,9 +440,9 @@ static inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame,
got_frame = 0;
if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) {
- ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt);
+ consumed = ff_thread_decode_frame(avctx, frame, &got_frame, pkt);
} else {
- ret = codec->cb.decode(avctx, frame, &got_frame, pkt);
+ consumed = codec->cb.decode(avctx, frame, &got_frame, pkt);
if (!(codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS))
frame->pkt_dts = pkt->dts;
@@ -347,132 +464,30 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
}
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 = 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->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 && 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->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 (!got_frame)
+ av_frame_unref(frame);
- 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_VIDEO) {
+ ret = (!got_frame || frame->flags & AV_FRAME_FLAG_DISCARD) ? AVERROR(EAGAIN) : 0;
+ } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO)
+ ret = discard_samples(avctx, frame, discarded_samples);
- if (!got_frame)
+ if (ret == AVERROR(EAGAIN))
av_frame_unref(frame);
- if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO)
- ret = pkt->size;
+ 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 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) {
+ /* 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 */
@@ -490,11 +505,9 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
}
- if (ret >= pkt->size || ret < 0) {
+ if (consumed >= pkt->size || ret < 0) {
av_packet_unref(pkt);
} else {
- int consumed = ret;
-
pkt->data += consumed;
pkt->size -= consumed;
pkt->pts = AV_NOPTS_VALUE;
@@ -509,10 +522,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
}
- if (got_frame)
- av_assert0(frame->buf[0]);
-
- return ret < 0 ? ret : 0;
+ return ret;
}
#if CONFIG_LCMS2
--
2.41.0
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^ permalink raw reply [flat|nested] 3+ messages in thread* [FFmpeg-devel] [PATCH v3 2/3] avcodec/decode: fill missing frame fields for all decoders
2023-07-10 21:54 [FFmpeg-devel] [PATCH v3 1/3] avcodec/decode: move processing discard samples to its own function James Almer
@ 2023-07-10 21:54 ` James Almer
2023-07-10 21:54 ` [FFmpeg-devel] [PATCH 3/3] avcodec/decode: prevent discarding skip_samples side data if the decoder didn't generate a frame James Almer
1 sibling, 0 replies; 3+ messages in thread
From: James Almer @ 2023-07-10 21:54 UTC (permalink / raw)
To: ffmpeg-devel
And not just those with the old decode() API.
Signed-off-by: James Almer <jamrial@gmail.com>
---
No changes since last version.
libavcodec/decode.c | 65 ++++++++++++++++++++++++---------------------
1 file changed, 34 insertions(+), 31 deletions(-)
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index c9da8f685c..1270acaa50 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -292,7 +292,6 @@ static int64_t guess_correct_pts(AVCodecContext *ctx,
static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
{
AVCodecInternal *avci = avctx->internal;
- int ret = 0;
uint8_t *side;
size_t side_size;
uint32_t discard_padding = 0;
@@ -313,26 +312,6 @@ static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *disca
if (!frame->buf[0])
return AVERROR(EAGAIN);
- 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;
- }
- }
-#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;
-
if ((frame->flags & AV_FRAME_FLAG_DISCARD) &&
!(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples);
@@ -403,7 +382,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
}
- return ret;
+ return 0;
}
/*
@@ -453,14 +432,6 @@ FF_DISABLE_DEPRECATION_WARNINGS
frame->pkt_pos = pkt->pos;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
- //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();
@@ -614,8 +585,40 @@ static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame)
}
if (!ret) {
- if (avctx->codec_type != AVMEDIA_TYPE_VIDEO)
+ if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+ //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;
+ }
+ } 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) {
+ av_frame_unref(frame);
+ return ret;
+ }
+ }
+#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;
+
frame->flags |= AV_FRAME_FLAG_KEY;
+ }
+
#if FF_API_FRAME_KEY
FF_DISABLE_DEPRECATION_WARNINGS
frame->key_frame = !!(frame->flags & AV_FRAME_FLAG_KEY);
--
2.41.0
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^ permalink raw reply [flat|nested] 3+ messages in thread* [FFmpeg-devel] [PATCH 3/3] avcodec/decode: prevent discarding skip_samples side data if the decoder didn't generate a frame
2023-07-10 21:54 [FFmpeg-devel] [PATCH v3 1/3] avcodec/decode: move processing discard samples to its own function James Almer
2023-07-10 21:54 ` [FFmpeg-devel] [PATCH v3 2/3] avcodec/decode: fill missing frame fields for all decoders James Almer
@ 2023-07-10 21:54 ` James Almer
1 sibling, 0 replies; 3+ messages in thread
From: James Almer @ 2023-07-10 21:54 UTC (permalink / raw)
To: ffmpeg-devel
Accumulate it instead, to be applied once a frame is returned.
This change also prevents decoder set values from being potentially overwritten
by side data.
Signed-off-by: James Almer <jamrial@gmail.com>
---
libavcodec/decode.c | 18 ++++++++++--------
libavcodec/internal.h | 2 +-
2 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index 1270acaa50..8b0f506d24 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -300,11 +300,12 @@ static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *disca
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 = FFMAX(0, avci->skip_samples);
+ uint32_t skip = AV_RL32(side);
+ skip = FFMIN(skip, INT64_MAX - avci->skip_samples);
+ avci->skip_samples += skip;
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);
+ av_log(avctx, AV_LOG_DEBUG, "skip %u / discard %d samples due to side data\n",
+ skip, (int)discard_padding);
skip_reason = AV_RL8(side + 8);
discard_reason = AV_RL8(side + 9);
}
@@ -324,7 +325,7 @@ static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *disca
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",
+ av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %"PRId64"\n",
avci->skip_samples);
return AVERROR(EAGAIN);
} else {
@@ -343,7 +344,7 @@ static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *disca
} 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",
+ av_log(avctx, AV_LOG_DEBUG, "skip %"PRId64"/%d samples\n",
avci->skip_samples, frame->nb_samples);
*discarded_samples += avci->skip_samples;
frame->nb_samples -= avci->skip_samples;
@@ -374,11 +375,12 @@ static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *disca
if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10);
if (fside) {
- AV_WL32(fside->data, avci->skip_samples);
+ uint32_t skip = FFMIN(avci->skip_samples, UINT32_MAX);
+ AV_WL32(fside->data, skip);
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;
+ avci->skip_samples -= skip;
}
}
diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index 868dd46b48..33c9bf9d9b 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -116,7 +116,7 @@ typedef struct AVCodecInternal {
/**
* Number of audio samples to skip at the start of the next decoded frame
*/
- int skip_samples;
+ int64_t skip_samples;
/**
* hwaccel-specific private data
--
2.41.0
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2023-07-10 21:54 [FFmpeg-devel] [PATCH v3 1/3] avcodec/decode: move processing discard samples to its own function James Almer
2023-07-10 21:54 ` [FFmpeg-devel] [PATCH v3 2/3] avcodec/decode: fill missing frame fields for all decoders James Almer
2023-07-10 21:54 ` [FFmpeg-devel] [PATCH 3/3] avcodec/decode: prevent discarding skip_samples side data if the decoder didn't generate a frame James Almer
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