[FFmpeg-cvslog] avcodec/h264: implement new decode_params callback for PPS/SPS

[Aman Gupta]

ffmpeg | branch: master | Aman Gupta <aman at tmm1.net> | Fri Nov 10 12:18:35 2017 -0800| [872add08540fb36b2d2ca75df86da7d8ac9579a1] | committer: Aman Gupta

avcodec/h264: implement new decode_params callback for PPS/SPS

This callback will be used by the VideoToolbox H264 hwaccel so that it
can receive SPS and PPS NALUs. VideoToolbox requires PPS changes to be
fed into the decoder session, and for the session to be recreated when
the SPS changes.

Signed-off-by: Aman Gupta <aman at tmm1.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=872add08540fb36b2d2ca75df86da7d8ac9579a1
---

 libavcodec/h264dec.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/libavcodec/h264dec.c b/libavcodec/h264dec.c
index 517f6acc13..be187eb5f4 100644
--- a/libavcodec/h264dec.c
+++ b/libavcodec/h264dec.c
@@ -713,6 +713,14 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
             break;
         case H264_NAL_SPS: {
             GetBitContext tmp_gb = nal->gb;
+            if (avctx->hwaccel && avctx->hwaccel->decode_params) {
+                ret = avctx->hwaccel->decode_params(avctx,
+                                                    nal->type,
+                                                    nal->raw_data,
+                                                    nal->raw_size);
+                if (ret < 0)
+                    goto end;
+            }
             if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
                 break;
             av_log(h->avctx, AV_LOG_DEBUG,
@@ -724,6 +732,14 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
             break;
         }
         case H264_NAL_PPS:
+            if (avctx->hwaccel && avctx->hwaccel->decode_params) {
+                ret = avctx->hwaccel->decode_params(avctx,
+                                                    nal->type,
+                                                    nal->raw_data,
+                                                    nal->raw_size);
+                if (ret < 0)
+                    goto end;
+            }
             ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
                                                        nal->size_bits);
             if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))