arm: Remove a leftover define for the pld instruction

[ffmpeg] / libavcodec / dca_parser.c

diff --git a/libavcodec/dca_parser.c b/libavcodec/dca_parser.c
index 70a3e989ba62c72c5d5e2d16a4375a56ca4b3db9..e233f50cfb9799127e1982d3949e422529f4187f 100644 (file)
--- a/libavcodec/dca_parser.c
+++ b/libavcodec/dca_parser.c
@@ -24,6 +24,7 @@
 
 #include "parser.h"
 #include "dca.h"
+#include "get_bits.h"
 
 typedef struct DCAParseContext {
     ParseContext pc;
@@ -39,7 +40,7 @@ typedef struct DCAParseContext {
  || state == DCA_MARKER_RAW_LE || state == DCA_MARKER_RAW_BE)
 
 /**
- * finds the end of the current frame in the bitstream.
+ * Find the end of the current frame in the bitstream.
  * @return the position of the first byte of the next frame, or -1
  */
 static int dca_find_frame_end(DCAParseContext * pc1, const uint8_t * buf,
@@ -59,10 +60,12 @@ static int dca_find_frame_end(DCAParseContext * pc1, const uint8_t * buf,
             if (IS_MARKER(state, i, buf, buf_size)) {
                 if (pc1->lastmarker && state == pc1->lastmarker) {
                     start_found = 1;
+                    i++;
                     break;
                 } else if (!pc1->lastmarker) {
                     start_found = 1;
                     pc1->lastmarker = state;
+                    i++;
                     break;
                 }
             }
@@ -77,9 +80,6 @@ static int dca_find_frame_end(DCAParseContext * pc1, const uint8_t * buf,
             if (state == pc1->lastmarker && IS_MARKER(state, i, buf, buf_size)) {
                 if(pc1->framesize > pc1->size)
                     continue;
-                if(!pc1->framesize){
-                    pc1->framesize = pc1->hd_pos ? pc1->hd_pos : pc1->size;
-                }
                 pc->frame_start_found = 0;
                 pc->state = -1;
                 pc1->size = 0;
@@ -100,6 +100,40 @@ static av_cold int dca_parse_init(AVCodecParserContext * s)
     return 0;
 }
 
+static int dca_parse_params(const uint8_t *buf, int buf_size, int *duration,
+                            int *sample_rate, int *framesize)
+{
+    GetBitContext gb;
+    uint8_t hdr[12 + FF_INPUT_BUFFER_PADDING_SIZE] = { 0 };
+    int ret, sample_blocks, sr_code;
+
+    if (buf_size < 12)
+        return AVERROR_INVALIDDATA;
+
+    if ((ret = ff_dca_convert_bitstream(buf, 12, hdr, 12)) < 0)
+        return ret;
+
+    init_get_bits(&gb, hdr, 96);
+
+    skip_bits_long(&gb, 39);
+    sample_blocks = get_bits(&gb, 7) + 1;
+    if (sample_blocks < 8)
+        return AVERROR_INVALIDDATA;
+    *duration = 256 * (sample_blocks / 8);
+
+    *framesize = get_bits(&gb, 14) + 1;
+    if (*framesize < 95)
+        return AVERROR_INVALIDDATA;
+
+    skip_bits(&gb, 6);
+    sr_code = get_bits(&gb, 4);
+    *sample_rate = avpriv_dca_sample_rates[sr_code];
+    if (*sample_rate == 0)
+        return AVERROR_INVALIDDATA;
+
+    return 0;
+}
+
 static int dca_parse(AVCodecParserContext * s,
                      AVCodecContext * avctx,
                      const uint8_t ** poutbuf, int *poutbuf_size,
@@ -107,7 +141,7 @@ static int dca_parse(AVCodecParserContext * s,
 {
     DCAParseContext *pc1 = s->priv_data;
     ParseContext *pc = &pc1->pc;
-    int next;
+    int next, duration, sample_rate;
 
     if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
         next = buf_size;
@@ -120,15 +154,23 @@ static int dca_parse(AVCodecParserContext * s,
             return buf_size;
         }
     }
+
+    /* read the duration and sample rate from the frame header */
+    if (!dca_parse_params(buf, buf_size, &duration, &sample_rate, &pc1->framesize)) {
+        s->duration = duration;
+        avctx->sample_rate = sample_rate;
+    } else
+        s->duration = 0;
+
     *poutbuf = buf;
     *poutbuf_size = buf_size;
     return next;
 }
 
 AVCodecParser ff_dca_parser = {
-    {CODEC_ID_DTS},
-    sizeof(DCAParseContext),
-    dca_parse_init,
-    dca_parse,
-    ff_parse_close,
+    .codec_ids      = { AV_CODEC_ID_DTS },
+    .priv_data_size = sizeof(DCAParseContext),
+    .parser_init    = dca_parse_init,
+    .parser_parse   = dca_parse,
+    .parser_close   = ff_parse_close,
 };