avcodec/cavs_parser: fix finding the end of a frame

Use the next I/P/B or start code as the end of current frame.

Before the patch, extension start code, user data start code,
sequence end code and so on are treated as the start of next
frame.
Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

libavcodec/cavs_parser.c

@@ -59,12 +59,11 @@ static int cavs_find_frame_end(ParseContext *pc, const uint8_t *buf,
             return 0;
         for(; i<buf_size; i++){
             state= (state<<8) | buf[i];
-            if((state&0xFFFFFF00) == 0x100){
-                if(state > SLICE_MAX_START_CODE){
-                    pc->frame_start_found=0;
-                    pc->state=-1;
-                    return i-3;
-                }
+            if (state == PIC_I_START_CODE || state == PIC_PB_START_CODE ||
+                    state == CAVS_START_CODE) {
+                pc->frame_start_found=0;
+                pc->state=-1;
+                return i-3;
             }
         }
     }

tests/fate/demux.mak

@@ -29,6 +29,9 @@ fate-bcstm: CMD = crc -i $(TARGET_SAMPLES)/bfstm/loz-mm-mikau.bcstm -c:a copy
 FATE_SAMPLES_DEMUX-$(CONFIG_BRSTM_DEMUXER) += fate-brstm
 fate-brstm: CMD = crc -i $(TARGET_SAMPLES)/brstm/lozswd_partial.brstm -c:a copy
 
+FATE_FFPROBE_DEMUX-$(call ALLYES, CAVSVIDEO_DEMUXER CAVSVIDEO_PARSER) += fate-cavs-demux
+fate-cavs-demux: CMD = ffprobe_demux $(TARGET_SAMPLES)/cavs/bunny.cavs
+
 FATE_SAMPLES_DEMUX-$(CONFIG_CDXL_DEMUXER) += fate-cdxl-demux
 fate-cdxl-demux: CMD = framecrc -i $(TARGET_SAMPLES)/cdxl/mirage.cdxl -c:v copy -c:a copy