mpeg4video: Add support for MPEG-4 Simple Studio Profile.

This is a profile supporting > 8-bit video and has a higher quality DCT

1 files changed, 11 insertions, 0 deletions

diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index 5608b63245..484bf39578 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -47,6 +47,12 @@
 
 static enum AVPixelFormat h263_get_format(AVCodecContext *avctx)
 {
+    /* MPEG-4 Studio Profile only, not supported by hardware */
+    if (avctx->bits_per_raw_sample > 8) {
+        av_assert1(avctx->profile == FF_PROFILE_MPEG4_SIMPLE_STUDIO);
+        return avctx->pix_fmt;
+    }
+
     if (avctx->codec->id == AV_CODEC_ID_MSS2)
         return AV_PIX_FMT_YUV420P;
 
@@ -197,6 +203,11 @@ static int decode_slice(MpegEncContext *s)
 
     ff_set_qscale(s, s->qscale);
 
+    if (s->studio_profile) {
+        if ((ret = ff_mpeg4_decode_studio_slice_header(s->avctx->priv_data)) < 0)
+            return ret;
+    }
+
     if (s->avctx->hwaccel) {
         const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
         ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start);