Ticket #2618: wait_for_keyframes_to_enable_p-frames_in_png_fca435f.patch

File wait_for_keyframes_to_enable_p-frames_in_png_fca435f.patch, 1.0 KB (added by Thilo Borgmann, 13 years ago)

Patch for todays revision that does not fix it anymore.

  • libavcodec/pngdec.c 

    diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 8b33826..5055360 100644
    a b typedef struct PNGDecContext {  
    5252    int channels;
    5353    int bits_per_pixel;
    5454    int bpp;
     55    int has_keyframes;
    5556
    5657    uint8_t *image_buf;
    5758    int image_linesize;
    … … static int decode_frame(AVCodecContext *avctx,  
    819820        }
    820821    }
    821822
    822      /* handle p-frames only if a predecessor frame is available */
    823      if (s->prev->data[0]) {
     823    if (avpkt->flags & AV_PKT_FLAG_KEY) {
     824        s->has_keyframes = 1;
     825    }
     826
     827     /* handle p-frames only if a predecessor frame is available
     828        and keyframes are indicated */
     829     if (s->prev->data[0] && s->has_keyframes) {
    824830         if (   !(avpkt->flags & AV_PKT_FLAG_KEY)
    825831            && s->prev->width == p->width
    826832            && s->prev->height== p->height
    … … static av_cold int png_dec_init(AVCodecContext *avctx)  
    875881
    876882    s->avctx = avctx;
    877883
     884    s->has_keyframes = 0;
     885
    878886    return 0;
    879887}
    880888