Split SEI code off h264.c.

Originally committed as revision 21168 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 3 insertions, 176 deletions

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index bf45c7c151..163562dd79 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -1568,18 +1568,6 @@ static av_cold void common_init(H264Context *h){
     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
 }
 
-/**
- * Reset SEI values at the beginning of the frame.
- *
- * @param h H.264 context.
- */
-static void reset_sei(H264Context *h) {
-    h->sei_recovery_frame_cnt       = -1;
-    h->sei_dpb_output_delay         =  0;
-    h->sei_cpb_removal_delay        = -1;
-    h->sei_buffering_period_present =  0;
-}
-
 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
     H264Context *h= avctx->priv_data;
     MpegEncContext * const s = &h->s;
@@ -1613,7 +1601,7 @@ av_cold int ff_h264_decode_init(AVCodecContext *avctx){
     h->thread_context[0] = h;
     h->outputed_poc = INT_MIN;
     h->prev_poc_msb= 1<<16;
-    reset_sei(h);
+    ff_h264_reset_sei(h);
     if(avctx->codec_id == CODEC_ID_H264){
         if(avctx->ticks_per_frame == 1){
             s->avctx->time_base.den *=2;
@@ -2559,7 +2547,7 @@ static void flush_dpb(AVCodecContext *avctx){
     if(h->s.current_picture_ptr)
         h->s.current_picture_ptr->reference= 0;
     h->s.first_field= 0;
-    reset_sei(h);
+    ff_h264_reset_sei(h);
     ff_mpeg_flush(avctx);
 }
 
@@ -5606,167 +5594,6 @@ static int decode_slice(struct AVCodecContext *avctx, void *arg){
     return -1; //not reached
 }
 
-static int decode_picture_timing(H264Context *h){
-    MpegEncContext * const s = &h->s;
-    if(h->sps.nal_hrd_parameters_present_flag || h->sps.vcl_hrd_parameters_present_flag){
-        h->sei_cpb_removal_delay = get_bits(&s->gb, h->sps.cpb_removal_delay_length);
-        h->sei_dpb_output_delay = get_bits(&s->gb, h->sps.dpb_output_delay_length);
-    }
-    if(h->sps.pic_struct_present_flag){
-        unsigned int i, num_clock_ts;
-        h->sei_pic_struct = get_bits(&s->gb, 4);
-        h->sei_ct_type    = 0;
-
-        if (h->sei_pic_struct > SEI_PIC_STRUCT_FRAME_TRIPLING)
-            return -1;
-
-        num_clock_ts = sei_num_clock_ts_table[h->sei_pic_struct];
-
-        for (i = 0 ; i < num_clock_ts ; i++){
-            if(get_bits(&s->gb, 1)){                  /* clock_timestamp_flag */
-                unsigned int full_timestamp_flag;
-                h->sei_ct_type |= 1<<get_bits(&s->gb, 2);
-                skip_bits(&s->gb, 1);                 /* nuit_field_based_flag */
-                skip_bits(&s->gb, 5);                 /* counting_type */
-                full_timestamp_flag = get_bits(&s->gb, 1);
-                skip_bits(&s->gb, 1);                 /* discontinuity_flag */
-                skip_bits(&s->gb, 1);                 /* cnt_dropped_flag */
-                skip_bits(&s->gb, 8);                 /* n_frames */
-                if(full_timestamp_flag){
-                    skip_bits(&s->gb, 6);             /* seconds_value 0..59 */
-                    skip_bits(&s->gb, 6);             /* minutes_value 0..59 */
-                    skip_bits(&s->gb, 5);             /* hours_value 0..23 */
-                }else{
-                    if(get_bits(&s->gb, 1)){          /* seconds_flag */
-                        skip_bits(&s->gb, 6);         /* seconds_value range 0..59 */
-                        if(get_bits(&s->gb, 1)){      /* minutes_flag */
-                            skip_bits(&s->gb, 6);     /* minutes_value 0..59 */
-                            if(get_bits(&s->gb, 1))   /* hours_flag */
-                                skip_bits(&s->gb, 5); /* hours_value 0..23 */
-                        }
-                    }
-                }
-                if(h->sps.time_offset_length > 0)
-                    skip_bits(&s->gb, h->sps.time_offset_length); /* time_offset */
-            }
-        }
-
-        if(s->avctx->debug & FF_DEBUG_PICT_INFO)
-            av_log(s->avctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n", h->sei_ct_type, h->sei_pic_struct);
-    }
-    return 0;
-}
-
-static int decode_unregistered_user_data(H264Context *h, int size){
-    MpegEncContext * const s = &h->s;
-    uint8_t user_data[16+256];
-    int e, build, i;
-
-    if(size<16)
-        return -1;
-
-    for(i=0; i<sizeof(user_data)-1 && i<size; i++){
-        user_data[i]= get_bits(&s->gb, 8);
-    }
-
-    user_data[i]= 0;
-    e= sscanf(user_data+16, "x264 - core %d"/*%s - H.264/MPEG-4 AVC codec - Copyleft 2005 - http://www.videolan.org/x264.html*/, &build);
-    if(e==1 && build>=0)
-        h->x264_build= build;
-
-    if(s->avctx->debug & FF_DEBUG_BUGS)
-        av_log(s->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data+16);
-
-    for(; i<size; i++)
-        skip_bits(&s->gb, 8);
-
-    return 0;
-}
-
-static int decode_recovery_point(H264Context *h){
-    MpegEncContext * const s = &h->s;
-
-    h->sei_recovery_frame_cnt = get_ue_golomb(&s->gb);
-    skip_bits(&s->gb, 4);       /* 1b exact_match_flag, 1b broken_link_flag, 2b changing_slice_group_idc */
-
-    return 0;
-}
-
-static int decode_buffering_period(H264Context *h){
-    MpegEncContext * const s = &h->s;
-    unsigned int sps_id;
-    int sched_sel_idx;
-    SPS *sps;
-
-    sps_id = get_ue_golomb_31(&s->gb);
-    if(sps_id > 31 || !h->sps_buffers[sps_id]) {
-        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %d referenced in buffering period\n", sps_id);
-        return -1;
-    }
-    sps = h->sps_buffers[sps_id];
-
-    // NOTE: This is really so duplicated in the standard... See H.264, D.1.1
-    if (sps->nal_hrd_parameters_present_flag) {
-        for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
-            h->initial_cpb_removal_delay[sched_sel_idx] = get_bits(&s->gb, sps->initial_cpb_removal_delay_length);
-            skip_bits(&s->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset
-        }
-    }
-    if (sps->vcl_hrd_parameters_present_flag) {
-        for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
-            h->initial_cpb_removal_delay[sched_sel_idx] = get_bits(&s->gb, sps->initial_cpb_removal_delay_length);
-            skip_bits(&s->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset
-        }
-    }
-
-    h->sei_buffering_period_present = 1;
-    return 0;
-}
-
-int ff_h264_decode_sei(H264Context *h){
-    MpegEncContext * const s = &h->s;
-
-    while(get_bits_count(&s->gb) + 16 < s->gb.size_in_bits){
-        int size, type;
-
-        type=0;
-        do{
-            type+= show_bits(&s->gb, 8);
-        }while(get_bits(&s->gb, 8) == 255);
-
-        size=0;
-        do{
-            size+= show_bits(&s->gb, 8);
-        }while(get_bits(&s->gb, 8) == 255);
-
-        switch(type){
-        case SEI_TYPE_PIC_TIMING: // Picture timing SEI
-            if(decode_picture_timing(h) < 0)
-                return -1;
-            break;
-        case SEI_TYPE_USER_DATA_UNREGISTERED:
-            if(decode_unregistered_user_data(h, size) < 0)
-                return -1;
-            break;
-        case SEI_TYPE_RECOVERY_POINT:
-            if(decode_recovery_point(h) < 0)
-                return -1;
-            break;
-        case SEI_BUFFERING_PERIOD:
-            if(decode_buffering_period(h) < 0)
-                return -1;
-            break;
-        default:
-            skip_bits(&s->gb, 8*size);
-        }
-
-        //FIXME check bits here
-        align_get_bits(&s->gb);
-    }
-
-    return 0;
-}
-
 static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
     MpegEncContext * const s = &h->s;
     int cpb_count, i;
@@ -6257,7 +6084,7 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
         h->current_slice = 0;
         if (!s->first_field)
             s->current_picture_ptr= NULL;
-        reset_sei(h);
+        ff_h264_reset_sei(h);
     }
 
     for(;;){