[FFmpeg-devel] [PATCH 1/3] avcodec/agm: add support for higher compression

[Michael Niedermayer]

On Wed, Apr 10, 2019 at 01:45:51PM +0200, Paul B Mahol wrote:
> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
>  libavcodec/agm.c   | 404 +++++++++++++++++++++++++++++++++++++++++++--
>  libavformat/riff.c |   4 +
>  2 files changed, 392 insertions(+), 16 deletions(-)
[...]
> @@ -509,6 +861,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
>      GetByteContext *gbyte = &s->gbyte;
>      AVFrame *frame = data;
>      int w, h, width, height, header;
> +    unsigned compressed_size;
>      int ret;
>  
>      if (!avpkt->size)
> @@ -524,13 +877,19 @@ static int decode_frame(AVCodecContext *avctx, void *data,
>      if (avpkt->size < s->bitstream_size + 8)
>          return AVERROR_INVALIDDATA;
>  
> -    s->key_frame = s->fflags & 0x1;
> +    s->key_frame = avpkt->flags & AV_PKT_FLAG_KEY;
>      frame->key_frame = s->key_frame;
>      frame->pict_type = s->key_frame ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
>  
>      if (header) {
> -        av_log(avctx, AV_LOG_ERROR, "header: %X\n", header);
> -        return AVERROR_PATCHWELCOME;
> +        if (avctx->codec_tag == MKTAG('A', 'G', 'M', '0') ||
> +            avctx->codec_tag == MKTAG('A', 'G', 'M', '1'))
> +            return AVERROR_PATCHWELCOME;
> +        else

> +            ret = decode_huffman2(avctx, header, (avpkt->size - s->bitstream_size) - 8);

where can i find samples for this ?
i need to fix some bugs in this as it produces crashes but i have
no samples to test to ensure a fix doesnt break anything

Thanks

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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