* [FFmpeg-devel] [PATCH] nvdec/vc1: add marker insertion logic
@ 2025-03-04 17:17 averne
2025-03-12 17:41 ` averne
2025-04-08 9:19 ` Zhao Zhili
0 siblings, 2 replies; 4+ messages in thread
From: averne @ 2025-03-04 17:17 UTC (permalink / raw)
To: ffmpeg-devel; +Cc: averne
---
Insert the relevant marker into the bitstream on
slice submission.
This is analogous to the logic found in DXVA and
D3D hwaccels.
Fixes decoding of various VC-1 streams, eg.:
https://drive.google.com/file/d/1WJyiRhcdU4FHTW3sVMitS7UdrZM1NBy-/view?usp=sharing
This was investigated using my nvdec tracing tool:
https://github.com/averne/NvdecTrace
Signed-off-by: averne <averne381@gmail.com>
---
libavcodec/nvdec_vc1.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 48 insertions(+), 2 deletions(-)
diff --git a/libavcodec/nvdec_vc1.c b/libavcodec/nvdec_vc1.c
index fbfba1ecb43421573ef8fea1e37a2425c272edc9..2726574a26583b0cfc28bdec5595c15bdc465ff8 100644
--- a/libavcodec/nvdec_vc1.c
+++ b/libavcodec/nvdec_vc1.c
@@ -22,6 +22,7 @@
#include "config_components.h"
+#include "libavutil/mem.h"
#include "avcodec.h"
#include "hwaccel_internal.h"
#include "internal.h"
@@ -107,6 +108,51 @@ static int nvdec_vc1_start_frame(AVCodecContext *avctx, const uint8_t *buffer, u
return 0;
}
+static int nvdec_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
+ uint32_t size)
+{
+ NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
+ const VC1Context *v = avctx->priv_data;
+ uint32_t marker;
+ int marker_size;
+ void *tmp;
+
+ if (avctx->codec_id != AV_CODEC_ID_VC1) {
+ marker_size = 0;
+ } else {
+ if (ctx->bitstream_len)
+ marker = VC1_CODE_SLICE;
+ else if (v->profile == PROFILE_ADVANCED && v->fcm == ILACE_FIELD && v->second_field)
+ marker = VC1_CODE_FIELD;
+ else
+ marker = VC1_CODE_FRAME;
+
+ marker_size = (size >= sizeof(marker) && AV_RB32(buffer) != marker) ? sizeof(marker) : 0;
+ }
+
+ tmp = av_fast_realloc(ctx->bitstream_internal, &ctx->bitstream_allocated,
+ ctx->bitstream_len + size + marker_size);
+ if (!tmp)
+ return AVERROR(ENOMEM);
+ ctx->bitstream = ctx->bitstream_internal = tmp;
+
+ tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated,
+ (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets));
+ if (!tmp)
+ return AVERROR(ENOMEM);
+ ctx->slice_offsets = tmp;
+
+ if (marker_size)
+ AV_WB32(ctx->bitstream_internal + ctx->bitstream_len, marker);
+
+ memcpy(ctx->bitstream_internal + ctx->bitstream_len + marker_size, buffer, size);
+ ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len;
+ ctx->bitstream_len += size + marker_size;
+ ctx->nb_slices++;
+
+ return 0;
+}
+
static int nvdec_vc1_frame_params(AVCodecContext *avctx,
AVBufferRef *hw_frames_ctx)
{
@@ -121,7 +167,7 @@ const FFHWAccel ff_vc1_nvdec_hwaccel = {
.p.pix_fmt = AV_PIX_FMT_CUDA,
.start_frame = nvdec_vc1_start_frame,
.end_frame = ff_nvdec_simple_end_frame,
- .decode_slice = ff_nvdec_simple_decode_slice,
+ .decode_slice = nvdec_vc1_decode_slice,
.frame_params = nvdec_vc1_frame_params,
.init = ff_nvdec_decode_init,
.uninit = ff_nvdec_decode_uninit,
@@ -136,7 +182,7 @@ const FFHWAccel ff_wmv3_nvdec_hwaccel = {
.p.pix_fmt = AV_PIX_FMT_CUDA,
.start_frame = nvdec_vc1_start_frame,
.end_frame = ff_nvdec_simple_end_frame,
- .decode_slice = ff_nvdec_simple_decode_slice,
+ .decode_slice = nvdec_vc1_decode_slice,
.frame_params = nvdec_vc1_frame_params,
.init = ff_nvdec_decode_init,
.uninit = ff_nvdec_decode_uninit,
---
base-commit: f76195ff656d6bea68feee783160652e2b3e3d60
change-id: 20250304-nvdec-vc1-marker2-53d6bd30ee99
Best regards,
--
averne <averne381@gmail.com>
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [FFmpeg-devel] [PATCH] nvdec/vc1: add marker insertion logic
2025-03-04 17:17 [FFmpeg-devel] [PATCH] nvdec/vc1: add marker insertion logic averne
@ 2025-03-12 17:41 ` averne
2025-04-08 9:19 ` Zhao Zhili
1 sibling, 0 replies; 4+ messages in thread
From: averne @ 2025-03-12 17:41 UTC (permalink / raw)
To: ffmpeg-devel
Bump
Le 04/03/2025 à 18:17, averne a écrit :
>
>
> ---
> Insert the relevant marker into the bitstream on
> slice submission.
> This is analogous to the logic found in DXVA and
> D3D hwaccels.
>
> Fixes decoding of various VC-1 streams, eg.:
> https://drive.google.com/file/d/1WJyiRhcdU4FHTW3sVMitS7UdrZM1NBy-/view?usp=sharing
>
> This was investigated using my nvdec tracing tool:
> https://github.com/averne/NvdecTrace
>
> Signed-off-by: averne <averne381@gmail.com>
> ---
> libavcodec/nvdec_vc1.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 48 insertions(+), 2 deletions(-)
>
> diff --git a/libavcodec/nvdec_vc1.c b/libavcodec/nvdec_vc1.c
> index fbfba1ecb43421573ef8fea1e37a2425c272edc9..2726574a26583b0cfc28bdec5595c15bdc465ff8 100644
> --- a/libavcodec/nvdec_vc1.c
> +++ b/libavcodec/nvdec_vc1.c
> @@ -22,6 +22,7 @@
>
> #include "config_components.h"
>
> +#include "libavutil/mem.h"
> #include "avcodec.h"
> #include "hwaccel_internal.h"
> #include "internal.h"
> @@ -107,6 +108,51 @@ static int nvdec_vc1_start_frame(AVCodecContext *avctx, const uint8_t *buffer, u
> return 0;
> }
>
> +static int nvdec_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
> + uint32_t size)
> +{
> + NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
> + const VC1Context *v = avctx->priv_data;
> + uint32_t marker;
> + int marker_size;
> + void *tmp;
> +
> + if (avctx->codec_id != AV_CODEC_ID_VC1) {
> + marker_size = 0;
> + } else {
> + if (ctx->bitstream_len)
> + marker = VC1_CODE_SLICE;
> + else if (v->profile == PROFILE_ADVANCED && v->fcm == ILACE_FIELD && v->second_field)
> + marker = VC1_CODE_FIELD;
> + else
> + marker = VC1_CODE_FRAME;
> +
> + marker_size = (size >= sizeof(marker) && AV_RB32(buffer) != marker) ? sizeof(marker) : 0;
> + }
> +
> + tmp = av_fast_realloc(ctx->bitstream_internal, &ctx->bitstream_allocated,
> + ctx->bitstream_len + size + marker_size);
> + if (!tmp)
> + return AVERROR(ENOMEM);
> + ctx->bitstream = ctx->bitstream_internal = tmp;
> +
> + tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated,
> + (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets));
> + if (!tmp)
> + return AVERROR(ENOMEM);
> + ctx->slice_offsets = tmp;
> +
> + if (marker_size)
> + AV_WB32(ctx->bitstream_internal + ctx->bitstream_len, marker);
> +
> + memcpy(ctx->bitstream_internal + ctx->bitstream_len + marker_size, buffer, size);
> + ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len;
> + ctx->bitstream_len += size + marker_size;
> + ctx->nb_slices++;
> +
> + return 0;
> +}
> +
> static int nvdec_vc1_frame_params(AVCodecContext *avctx,
> AVBufferRef *hw_frames_ctx)
> {
> @@ -121,7 +167,7 @@ const FFHWAccel ff_vc1_nvdec_hwaccel = {
> .p.pix_fmt = AV_PIX_FMT_CUDA,
> .start_frame = nvdec_vc1_start_frame,
> .end_frame = ff_nvdec_simple_end_frame,
> - .decode_slice = ff_nvdec_simple_decode_slice,
> + .decode_slice = nvdec_vc1_decode_slice,
> .frame_params = nvdec_vc1_frame_params,
> .init = ff_nvdec_decode_init,
> .uninit = ff_nvdec_decode_uninit,
> @@ -136,7 +182,7 @@ const FFHWAccel ff_wmv3_nvdec_hwaccel = {
> .p.pix_fmt = AV_PIX_FMT_CUDA,
> .start_frame = nvdec_vc1_start_frame,
> .end_frame = ff_nvdec_simple_end_frame,
> - .decode_slice = ff_nvdec_simple_decode_slice,
> + .decode_slice = nvdec_vc1_decode_slice,
> .frame_params = nvdec_vc1_frame_params,
> .init = ff_nvdec_decode_init,
> .uninit = ff_nvdec_decode_uninit,
>
> ---
> base-commit: f76195ff656d6bea68feee783160652e2b3e3d60
> change-id: 20250304-nvdec-vc1-marker2-53d6bd30ee99
>
> Best regards,
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [FFmpeg-devel] [PATCH] nvdec/vc1: add marker insertion logic
2025-03-04 17:17 [FFmpeg-devel] [PATCH] nvdec/vc1: add marker insertion logic averne
2025-03-12 17:41 ` averne
@ 2025-04-08 9:19 ` Zhao Zhili
2025-04-08 14:28 ` averne
1 sibling, 1 reply; 4+ messages in thread
From: Zhao Zhili @ 2025-04-08 9:19 UTC (permalink / raw)
To: FFmpeg development discussions and patches; +Cc: averne
Sorry for the long delay.
> On Mar 5, 2025, at 01:17, averne <averne381@gmail.com> wrote:
>
>
> ---
> Insert the relevant marker into the bitstream on
> slice submission.
> This is analogous to the logic found in DXVA and
> D3D hwaccels.
>
> Fixes decoding of various VC-1 streams, eg.:
> https://drive.google.com/file/d/1WJyiRhcdU4FHTW3sVMitS7UdrZM1NBy-/view?usp=sharing
I have tested and the patch works to fix the issue.
>
> This was investigated using my nvdec tracing tool:
> https://github.com/averne/NvdecTrace
>
> Signed-off-by: averne <averne381@gmail.com>
> ---
> libavcodec/nvdec_vc1.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 48 insertions(+), 2 deletions(-)
>
> diff --git a/libavcodec/nvdec_vc1.c b/libavcodec/nvdec_vc1.c
> index fbfba1ecb43421573ef8fea1e37a2425c272edc9..2726574a26583b0cfc28bdec5595c15bdc465ff8 100644
> --- a/libavcodec/nvdec_vc1.c
> +++ b/libavcodec/nvdec_vc1.c
> @@ -22,6 +22,7 @@
>
> #include "config_components.h"
>
> +#include "libavutil/mem.h"
> #include "avcodec.h"
> #include "hwaccel_internal.h"
> #include "internal.h"
> @@ -107,6 +108,51 @@ static int nvdec_vc1_start_frame(AVCodecContext *avctx, const uint8_t *buffer, u
> return 0;
> }
>
> +static int nvdec_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
> + uint32_t size)
> +{
> + NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
> + const VC1Context *v = avctx->priv_data;
> + uint32_t marker;
> + int marker_size;
> + void *tmp;
> +
> + if (avctx->codec_id != AV_CODEC_ID_VC1) {
> + marker_size = 0;
> + } else {
> + if (ctx->bitstream_len)
> + marker = VC1_CODE_SLICE;
> + else if (v->profile == PROFILE_ADVANCED && v->fcm == ILACE_FIELD && v->second_field)
> + marker = VC1_CODE_FIELD;
> + else
> + marker = VC1_CODE_FRAME;
> +
> + marker_size = (size >= sizeof(marker) && AV_RB32(buffer) != marker) ? sizeof(marker) : 0;
> + }
I’m not familiar with VC1 or WMV3, but if the maker only needed for VC1, you can remove the check on
codec_id, and keep ff_wmv3_nvdec_hwaccel as before (use ff_nvdec_simple_decode_slice).
Otherwise LGTM, thanks.
> +
> + tmp = av_fast_realloc(ctx->bitstream_internal, &ctx->bitstream_allocated,
> + ctx->bitstream_len + size + marker_size);
> + if (!tmp)
> + return AVERROR(ENOMEM);
> + ctx->bitstream = ctx->bitstream_internal = tmp;
> +
> + tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated,
> + (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets));
> + if (!tmp)
> + return AVERROR(ENOMEM);
> + ctx->slice_offsets = tmp;
> +
> + if (marker_size)
> + AV_WB32(ctx->bitstream_internal + ctx->bitstream_len, marker);
> +
> + memcpy(ctx->bitstream_internal + ctx->bitstream_len + marker_size, buffer, size);
> + ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len;
> + ctx->bitstream_len += size + marker_size;
> + ctx->nb_slices++;
> +
> + return 0;
> +}
> +
> static int nvdec_vc1_frame_params(AVCodecContext *avctx,
> AVBufferRef *hw_frames_ctx)
> {
> @@ -121,7 +167,7 @@ const FFHWAccel ff_vc1_nvdec_hwaccel = {
> .p.pix_fmt = AV_PIX_FMT_CUDA,
> .start_frame = nvdec_vc1_start_frame,
> .end_frame = ff_nvdec_simple_end_frame,
> - .decode_slice = ff_nvdec_simple_decode_slice,
> + .decode_slice = nvdec_vc1_decode_slice,
> .frame_params = nvdec_vc1_frame_params,
> .init = ff_nvdec_decode_init,
> .uninit = ff_nvdec_decode_uninit,
> @@ -136,7 +182,7 @@ const FFHWAccel ff_wmv3_nvdec_hwaccel = {
> .p.pix_fmt = AV_PIX_FMT_CUDA,
> .start_frame = nvdec_vc1_start_frame,
> .end_frame = ff_nvdec_simple_end_frame,
> - .decode_slice = ff_nvdec_simple_decode_slice,
> + .decode_slice = nvdec_vc1_decode_slice,
> .frame_params = nvdec_vc1_frame_params,
> .init = ff_nvdec_decode_init,
> .uninit = ff_nvdec_decode_uninit,
>
> ---
> base-commit: f76195ff656d6bea68feee783160652e2b3e3d60
> change-id: 20250304-nvdec-vc1-marker2-53d6bd30ee99
>
> Best regards,
> --
> averne <averne381@gmail.com>
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
_______________________________________________
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https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [FFmpeg-devel] [PATCH] nvdec/vc1: add marker insertion logic
2025-04-08 9:19 ` Zhao Zhili
@ 2025-04-08 14:28 ` averne
0 siblings, 0 replies; 4+ messages in thread
From: averne @ 2025-04-08 14:28 UTC (permalink / raw)
To: Zhao Zhili, FFmpeg development discussions and patches
Le 08/04/2025 à 11:19, Zhao Zhili a écrit :
> Sorry for the long delay.
No problem, thank you for the review.
>
>> On Mar 5, 2025, at 01:17, averne <averne381@gmail.com> wrote:
>>
>>
>> ---
>> Insert the relevant marker into the bitstream on
>> slice submission.
>> This is analogous to the logic found in DXVA and
>> D3D hwaccels.
>>
>> Fixes decoding of various VC-1 streams, eg.:
>> https://drive.google.com/file/d/1WJyiRhcdU4FHTW3sVMitS7UdrZM1NBy-/view?usp=sharing
>
> I have tested and the patch works to fix the issue.
>
>>
>> This was investigated using my nvdec tracing tool:
>> https://github.com/averne/NvdecTrace
>>
>> Signed-off-by: averne <averne381@gmail.com>
>> ---
>> libavcodec/nvdec_vc1.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
>> 1 file changed, 48 insertions(+), 2 deletions(-)
>>
>> diff --git a/libavcodec/nvdec_vc1.c b/libavcodec/nvdec_vc1.c
>> index fbfba1ecb43421573ef8fea1e37a2425c272edc9..2726574a26583b0cfc28bdec5595c15bdc465ff8 100644
>> --- a/libavcodec/nvdec_vc1.c
>> +++ b/libavcodec/nvdec_vc1.c
>> @@ -22,6 +22,7 @@
>>
>> #include "config_components.h"
>>
>> +#include "libavutil/mem.h"
>> #include "avcodec.h"
>> #include "hwaccel_internal.h"
>> #include "internal.h"
>> @@ -107,6 +108,51 @@ static int nvdec_vc1_start_frame(AVCodecContext *avctx, const uint8_t *buffer, u
>> return 0;
>> }
>>
>> +static int nvdec_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
>> + uint32_t size)
>> +{
>> + NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
>> + const VC1Context *v = avctx->priv_data;
>> + uint32_t marker;
>> + int marker_size;
>> + void *tmp;
>> +
>> + if (avctx->codec_id != AV_CODEC_ID_VC1) {
>> + marker_size = 0;
>> + } else {
>> + if (ctx->bitstream_len)
>> + marker = VC1_CODE_SLICE;
>> + else if (v->profile == PROFILE_ADVANCED && v->fcm == ILACE_FIELD && v->second_field)
>> + marker = VC1_CODE_FIELD;
>> + else
>> + marker = VC1_CODE_FRAME;
>> +
>> + marker_size = (size >= sizeof(marker) && AV_RB32(buffer) != marker) ? sizeof(marker) : 0;
>> + }
>
> I’m not familiar with VC1 or WMV3, but if the maker only needed for VC1, you can remove the check on
> codec_id, and keep ff_wmv3_nvdec_hwaccel as before (use ff_nvdec_simple_decode_slice).
>
> Otherwise LGTM, thanks.
That's a good point, I will send a revised patch shortly.
>
>> +
>> + tmp = av_fast_realloc(ctx->bitstream_internal, &ctx->bitstream_allocated,
>> + ctx->bitstream_len + size + marker_size);
>> + if (!tmp)
>> + return AVERROR(ENOMEM);
>> + ctx->bitstream = ctx->bitstream_internal = tmp;
>> +
>> + tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated,
>> + (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets));
>> + if (!tmp)
>> + return AVERROR(ENOMEM);
>> + ctx->slice_offsets = tmp;
>> +
>> + if (marker_size)
>> + AV_WB32(ctx->bitstream_internal + ctx->bitstream_len, marker);
>> +
>> + memcpy(ctx->bitstream_internal + ctx->bitstream_len + marker_size, buffer, size);
>> + ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len;
>> + ctx->bitstream_len += size + marker_size;
>> + ctx->nb_slices++;
>> +
>> + return 0;
>> +}
>> +
>> static int nvdec_vc1_frame_params(AVCodecContext *avctx,
>> AVBufferRef *hw_frames_ctx)
>> {
>> @@ -121,7 +167,7 @@ const FFHWAccel ff_vc1_nvdec_hwaccel = {
>> .p.pix_fmt = AV_PIX_FMT_CUDA,
>> .start_frame = nvdec_vc1_start_frame,
>> .end_frame = ff_nvdec_simple_end_frame,
>> - .decode_slice = ff_nvdec_simple_decode_slice,
>> + .decode_slice = nvdec_vc1_decode_slice,
>> .frame_params = nvdec_vc1_frame_params,
>> .init = ff_nvdec_decode_init,
>> .uninit = ff_nvdec_decode_uninit,
>> @@ -136,7 +182,7 @@ const FFHWAccel ff_wmv3_nvdec_hwaccel = {
>> .p.pix_fmt = AV_PIX_FMT_CUDA,
>> .start_frame = nvdec_vc1_start_frame,
>> .end_frame = ff_nvdec_simple_end_frame,
>> - .decode_slice = ff_nvdec_simple_decode_slice,
>> + .decode_slice = nvdec_vc1_decode_slice,
>> .frame_params = nvdec_vc1_frame_params,
>> .init = ff_nvdec_decode_init,
>> .uninit = ff_nvdec_decode_uninit,
>>
>> ---
>> base-commit: f76195ff656d6bea68feee783160652e2b3e3d60
>> change-id: 20250304-nvdec-vc1-marker2-53d6bd30ee99
>>
>> Best regards,
>> --
>> averne <averne381@gmail.com>
>>
>> _______________________________________________
>> ffmpeg-devel mailing list
>> ffmpeg-devel@ffmpeg.org
>> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>>
>> To unsubscribe, visit link above, or email
>> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
>
_______________________________________________
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https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2025-04-08 14:28 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2025-03-04 17:17 [FFmpeg-devel] [PATCH] nvdec/vc1: add marker insertion logic averne
2025-03-12 17:41 ` averne
2025-04-08 9:19 ` Zhao Zhili
2025-04-08 14:28 ` averne
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