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avcodec/cbs_h2645: use AVBufferRef to store list of active parameter sets

Browse Source 
Removes unnecessary data copies, and partially fixes potential issues
with dangling references held in said lists.

Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2018-05-08 20:09:28 -03:00
parent 293a6e8332
commit c6a63e1109
3 changed files with 31 additions and 20 deletions
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2
libavcodec/cbs_h264.h
View File

@ -421,6 +421,8 @@ typedef struct CodedBitstreamH264Context {
// All currently available parameter sets. These are updated when
// any parameter set NAL unit is read/written with this context.
AVBufferRef *sps_ref[H264_MAX_SPS_COUNT];
AVBufferRef *pps_ref[H264_MAX_PPS_COUNT];
H264RawSPS *sps[H264_MAX_SPS_COUNT];
H264RawPPS *pps[H264_MAX_PPS_COUNT];

46
libavcodec/cbs_h2645.c
View File

@ -677,9 +677,10 @@ static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
#define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
const H26 ## h26n ## Raw ## ps_name *ps_var) \
CodedBitstreamUnit *unit) \
{ \
CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
unsigned int id = ps_var->id_element; \
if (id > FF_ARRAY_ELEMS(priv->ps_var)) { \
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
@ -688,11 +689,16 @@ static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
} \
if (priv->ps_var[id] == priv->active_ ## ps_var) \
priv->active_ ## ps_var = NULL ; \
av_freep(&priv->ps_var[id]); \
priv->ps_var[id] = av_malloc(sizeof(*ps_var)); \
if (!priv->ps_var[id]) \
av_buffer_unref(&priv->ps_var ## _ref[id]); \
if (unit->content_ref) \
priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
else \
priv->ps_var ## _ref[id] = av_buffer_alloc(sizeof(*ps_var)); \
if (!priv->ps_var ## _ref[id]) \
return AVERROR(ENOMEM); \
memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
if (!unit->content_ref) \
memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
return 0; \
}
@ -726,7 +732,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h264_replace_sps(ctx, sps);
err = cbs_h264_replace_sps(ctx, unit);
if (err < 0)
return err;
}
@ -760,7 +766,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h264_replace_pps(ctx, pps);
err = cbs_h264_replace_pps(ctx, unit);
if (err < 0)
return err;
}
@ -873,7 +879,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h265_replace_vps(ctx, vps);
err = cbs_h265_replace_vps(ctx, unit);
if (err < 0)
return err;
}
@ -892,7 +898,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h265_replace_sps(ctx, sps);
err = cbs_h265_replace_sps(ctx, unit);
if (err < 0)
return err;
}
@ -912,7 +918,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h265_replace_pps(ctx, pps);
err = cbs_h265_replace_pps(ctx, unit);
if (err < 0)
return err;
}
@ -1002,7 +1008,7 @@ static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h264_replace_sps(ctx, sps);
err = cbs_h264_replace_sps(ctx, unit);
if (err < 0)
return err;
}
@ -1026,7 +1032,7 @@ static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h264_replace_pps(ctx, pps);
err = cbs_h264_replace_pps(ctx, unit);
if (err < 0)
return err;
}
@ -1123,7 +1129,7 @@ static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h265_replace_vps(ctx, vps);
err = cbs_h265_replace_vps(ctx, unit);
if (err < 0)
return err;
}
@ -1137,7 +1143,7 @@ static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h265_replace_sps(ctx, sps);
err = cbs_h265_replace_sps(ctx, unit);
if (err < 0)
return err;
}
@ -1151,7 +1157,7 @@ static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
if (err < 0)
return err;
err = cbs_h265_replace_pps(ctx, pps);
err = cbs_h265_replace_pps(ctx, unit);
if (err < 0)
return err;
}
@ -1385,9 +1391,9 @@ static void cbs_h264_close(CodedBitstreamContext *ctx)
av_freep(&h264->common.write_buffer);
for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
av_freep(&h264->sps[i]);
av_buffer_unref(&h264->sps_ref[i]);
for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
av_freep(&h264->pps[i]);
av_buffer_unref(&h264->pps_ref[i]);
}
static void cbs_h265_close(CodedBitstreamContext *ctx)
@ -1400,11 +1406,11 @@ static void cbs_h265_close(CodedBitstreamContext *ctx)
av_freep(&h265->common.write_buffer);
for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
av_freep(&h265->vps[i]);
av_buffer_unref(&h265->vps_ref[i]);
for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
av_freep(&h265->sps[i]);
av_buffer_unref(&h265->sps_ref[i]);
for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
av_freep(&h265->pps[i]);
av_buffer_unref(&h265->pps_ref[i]);
}
const CodedBitstreamType ff_cbs_type_h264 = {

3
libavcodec/cbs_h265.h
View File

@ -523,6 +523,9 @@ typedef struct CodedBitstreamH265Context {
// All currently available parameter sets. These are updated when
// any parameter set NAL unit is read/written with this context.
AVBufferRef *vps_ref[HEVC_MAX_VPS_COUNT];
AVBufferRef *sps_ref[HEVC_MAX_SPS_COUNT];
AVBufferRef *pps_ref[HEVC_MAX_PPS_COUNT];
H265RawVPS *vps[HEVC_MAX_VPS_COUNT];
H265RawSPS *sps[HEVC_MAX_SPS_COUNT];
H265RawPPS *pps[HEVC_MAX_PPS_COUNT];