* [FFmpeg-devel] [PATCH] avcodec/nvdec: Constify bitstream pointee
@ 2024-02-07 15:04 Andreas Rheinhardt
2024-02-07 22:35 ` Timo Rothenpieler
0 siblings, 1 reply; 2+ messages in thread
From: Andreas Rheinhardt @ 2024-02-07 15:04 UTC (permalink / raw)
To: ffmpeg-devel; +Cc: Andreas Rheinhardt
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
libavcodec/nvdec.c | 2 +-
libavcodec/nvdec.h | 2 +-
libavcodec/nvdec_av1.c | 4 ++--
libavcodec/nvdec_h264.c | 4 ++--
libavcodec/nvdec_hevc.c | 4 ++--
5 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/libavcodec/nvdec.c b/libavcodec/nvdec.c
index d13b790632..553c9bdf18 100644
--- a/libavcodec/nvdec.c
+++ b/libavcodec/nvdec.c
@@ -680,7 +680,7 @@ int ff_nvdec_simple_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
ctx->slice_offsets = tmp;
if (!ctx->bitstream)
- ctx->bitstream = (uint8_t*)buffer;
+ ctx->bitstream = buffer;
ctx->slice_offsets[ctx->nb_slices] = buffer - ctx->bitstream;
ctx->bitstream_len += size;
diff --git a/libavcodec/nvdec.h b/libavcodec/nvdec.h
index 353e95bf42..555300d27d 100644
--- a/libavcodec/nvdec.h
+++ b/libavcodec/nvdec.h
@@ -56,7 +56,7 @@ typedef struct NVDECContext {
struct NVDECDecoder *decoder; ///< RefStruct reference
- uint8_t *bitstream;
+ const uint8_t *bitstream;
int bitstream_len;
unsigned int bitstream_allocated;
uint8_t *bitstream_internal;
diff --git a/libavcodec/nvdec_av1.c b/libavcodec/nvdec_av1.c
index 74b0442177..35f22ebf80 100644
--- a/libavcodec/nvdec_av1.c
+++ b/libavcodec/nvdec_av1.c
@@ -303,7 +303,7 @@ static int nvdec_av1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
/* Shortcut if all tiles are in the same buffer */
if (ctx->nb_slices == s->tg_end - s->tg_start + 1) {
- ctx->bitstream = (uint8_t*)buffer;
+ ctx->bitstream = buffer;
ctx->bitstream_len = size;
for (int i = 0; i < ctx->nb_slices; ++i) {
@@ -321,7 +321,7 @@ static int nvdec_av1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
}
ctx->bitstream = ctx->bitstream_internal = tmp;
- memcpy(ctx->bitstream + ctx->bitstream_len, buffer, size);
+ memcpy(ctx->bitstream_internal + ctx->bitstream_len, buffer, size);
for (uint32_t tile_num = s->tg_start; tile_num <= s->tg_end; ++tile_num) {
ctx->slice_offsets[tile_num*2 ] = ctx->bitstream_len + s->tile_group_info[tile_num].tile_offset;
diff --git a/libavcodec/nvdec_h264.c b/libavcodec/nvdec_h264.c
index 8c72d5f4f7..ea6c1081eb 100644
--- a/libavcodec/nvdec_h264.c
+++ b/libavcodec/nvdec_h264.c
@@ -150,8 +150,8 @@ static int nvdec_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
return AVERROR(ENOMEM);
ctx->slice_offsets = tmp;
- AV_WB24(ctx->bitstream + ctx->bitstream_len, 1);
- memcpy(ctx->bitstream + ctx->bitstream_len + 3, buffer, size);
+ AV_WB24(ctx->bitstream_internal + ctx->bitstream_len, 1);
+ memcpy(ctx->bitstream_internal + ctx->bitstream_len + 3, buffer, size);
ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len ;
ctx->bitstream_len += size + 3;
ctx->nb_slices++;
diff --git a/libavcodec/nvdec_hevc.c b/libavcodec/nvdec_hevc.c
index 25319a1328..ff118af04b 100644
--- a/libavcodec/nvdec_hevc.c
+++ b/libavcodec/nvdec_hevc.c
@@ -286,8 +286,8 @@ static int nvdec_hevc_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
return AVERROR(ENOMEM);
ctx->slice_offsets = tmp;
- AV_WB24(ctx->bitstream + ctx->bitstream_len, 1);
- memcpy(ctx->bitstream + ctx->bitstream_len + 3, buffer, size);
+ AV_WB24(ctx->bitstream_internal + ctx->bitstream_len, 1);
+ memcpy(ctx->bitstream_internal + ctx->bitstream_len + 3, buffer, size);
ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len ;
ctx->bitstream_len += size + 3;
ctx->nb_slices++;
--
2.34.1
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [FFmpeg-devel] [PATCH] avcodec/nvdec: Constify bitstream pointee
2024-02-07 15:04 [FFmpeg-devel] [PATCH] avcodec/nvdec: Constify bitstream pointee Andreas Rheinhardt
@ 2024-02-07 22:35 ` Timo Rothenpieler
0 siblings, 0 replies; 2+ messages in thread
From: Timo Rothenpieler @ 2024-02-07 22:35 UTC (permalink / raw)
To: ffmpeg-devel
On 07.02.2024 16:04, Andreas Rheinhardt wrote:
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
> ---
> libavcodec/nvdec.c | 2 +-
> libavcodec/nvdec.h | 2 +-
> libavcodec/nvdec_av1.c | 4 ++--
> libavcodec/nvdec_h264.c | 4 ++--
> libavcodec/nvdec_hevc.c | 4 ++--
> 5 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/libavcodec/nvdec.c b/libavcodec/nvdec.c
> index d13b790632..553c9bdf18 100644
> --- a/libavcodec/nvdec.c
> +++ b/libavcodec/nvdec.c
> @@ -680,7 +680,7 @@ int ff_nvdec_simple_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
> ctx->slice_offsets = tmp;
>
> if (!ctx->bitstream)
> - ctx->bitstream = (uint8_t*)buffer;
> + ctx->bitstream = buffer;
>
> ctx->slice_offsets[ctx->nb_slices] = buffer - ctx->bitstream;
> ctx->bitstream_len += size;
> diff --git a/libavcodec/nvdec.h b/libavcodec/nvdec.h
> index 353e95bf42..555300d27d 100644
> --- a/libavcodec/nvdec.h
> +++ b/libavcodec/nvdec.h
> @@ -56,7 +56,7 @@ typedef struct NVDECContext {
>
> struct NVDECDecoder *decoder; ///< RefStruct reference
>
> - uint8_t *bitstream;
> + const uint8_t *bitstream;
> int bitstream_len;
> unsigned int bitstream_allocated;
> uint8_t *bitstream_internal;
> diff --git a/libavcodec/nvdec_av1.c b/libavcodec/nvdec_av1.c
> index 74b0442177..35f22ebf80 100644
> --- a/libavcodec/nvdec_av1.c
> +++ b/libavcodec/nvdec_av1.c
> @@ -303,7 +303,7 @@ static int nvdec_av1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
>
> /* Shortcut if all tiles are in the same buffer */
> if (ctx->nb_slices == s->tg_end - s->tg_start + 1) {
> - ctx->bitstream = (uint8_t*)buffer;
> + ctx->bitstream = buffer;
> ctx->bitstream_len = size;
>
> for (int i = 0; i < ctx->nb_slices; ++i) {
> @@ -321,7 +321,7 @@ static int nvdec_av1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
> }
> ctx->bitstream = ctx->bitstream_internal = tmp;
>
> - memcpy(ctx->bitstream + ctx->bitstream_len, buffer, size);
> + memcpy(ctx->bitstream_internal + ctx->bitstream_len, buffer, size);
>
> for (uint32_t tile_num = s->tg_start; tile_num <= s->tg_end; ++tile_num) {
> ctx->slice_offsets[tile_num*2 ] = ctx->bitstream_len + s->tile_group_info[tile_num].tile_offset;
> diff --git a/libavcodec/nvdec_h264.c b/libavcodec/nvdec_h264.c
> index 8c72d5f4f7..ea6c1081eb 100644
> --- a/libavcodec/nvdec_h264.c
> +++ b/libavcodec/nvdec_h264.c
> @@ -150,8 +150,8 @@ static int nvdec_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
> return AVERROR(ENOMEM);
> ctx->slice_offsets = tmp;
>
> - AV_WB24(ctx->bitstream + ctx->bitstream_len, 1);
> - memcpy(ctx->bitstream + ctx->bitstream_len + 3, buffer, size);
> + AV_WB24(ctx->bitstream_internal + ctx->bitstream_len, 1);
> + memcpy(ctx->bitstream_internal + ctx->bitstream_len + 3, buffer, size);
> ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len ;
> ctx->bitstream_len += size + 3;
> ctx->nb_slices++;
> diff --git a/libavcodec/nvdec_hevc.c b/libavcodec/nvdec_hevc.c
> index 25319a1328..ff118af04b 100644
> --- a/libavcodec/nvdec_hevc.c
> +++ b/libavcodec/nvdec_hevc.c
> @@ -286,8 +286,8 @@ static int nvdec_hevc_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
> return AVERROR(ENOMEM);
> ctx->slice_offsets = tmp;
>
> - AV_WB24(ctx->bitstream + ctx->bitstream_len, 1);
> - memcpy(ctx->bitstream + ctx->bitstream_len + 3, buffer, size);
> + AV_WB24(ctx->bitstream_internal + ctx->bitstream_len, 1);
> + memcpy(ctx->bitstream_internal + ctx->bitstream_len + 3, buffer, size);
> ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len ;
> ctx->bitstream_len += size + 3;
> ctx->nb_slices++;
LGTM
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2024-02-07 15:04 [FFmpeg-devel] [PATCH] avcodec/nvdec: Constify bitstream pointee Andreas Rheinhardt
2024-02-07 22:35 ` Timo Rothenpieler
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