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avcodec/internal: Allow receive_frame codecs to use decode_simple pkt

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Decoders implementing the receive_frame API currently mostly use
stack packets to temporarily hold the packet they receive from
ff_decode_get_packet(). This role directly parallels the role of
in_pkt, the spare packet used in decode_simple_internal for the
decoders implementing the traditional decoding API. Said packet
is unused by the generic code for the decoders implementing the
receive_frame API, so allow them to use it to fulfill the function
it already fulfills for the traditional API for both APIs.

There is only one caveat in this: The packet is automatically
unreferenced in avcodec_flush_buffers(). But this is actually
positive as it means the decoders don't have to do this themselves
(in case the packet is preserved between receive_frame calls).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2021-09-23 22:34:39 +02:00
parent 9139dc6140
commit ffdda740fe
3 changed files with 14 additions and 11 deletions
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3
libavcodec/decode.c
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@@ -296,8 +296,7 @@ static int64_t guess_correct_pts(AVCodecContext *ctx,
static inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
{
AVCodecInternal *avci = avctx->internal;
DecodeSimpleContext *ds = &avci->ds;
AVPacket *pkt = ds->in_pkt;
AVPacket *const pkt = avci->in_pkt;
int got_frame, actual_got_frame;
int ret;