Browse code

removal of stream_type in AACAC3ParseContext and adding AACAC3FrameFlag

Originally committed as revision 12622 to svn://svn.ffmpeg.org/ffmpeg/trunk

Bartlomiej Wolowiec authored on 2008/03/29 04:59:58
Showing 4 changed files
... ...
@@ -29,6 +29,7 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
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                      const uint8_t *buf, int buf_size)
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 {
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     AACAC3ParseContext *s = s1->priv_data;
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+    AACAC3FrameFlag frame_flag;
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     const uint8_t *buf_ptr;
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     int len;
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... ...
@@ -50,7 +51,7 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
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         if (s->frame_size == 0) {
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             if ((s->inbuf_ptr - s->inbuf) == s->header_size) {
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-                len = s->sync(s);
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+                len = s->sync(s, &frame_flag);
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                 if (len == 0) {
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                     /* no sync found : move by one byte (inefficient, but simple!) */
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                     memmove(s->inbuf, s->inbuf + 1, s->header_size - 1);
... ...
@@ -26,18 +26,23 @@
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 #include <stdint.h>
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 #include "avcodec.h"
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+typedef enum{
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+    FRAME_COMPLETE,    ///< Complete frame, ends previous frame
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+    FRAME_START,       ///< Frame start, ends previous frame
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+    FRAME_CONTINUATION ///< Part of the previous frame
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+}AACAC3FrameFlag;
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+
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 typedef struct AACAC3ParseContext {
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     uint8_t *inbuf_ptr;
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     int frame_size;
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     int header_size;
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-    int (*sync)(struct AACAC3ParseContext *hdr_info);
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+    int (*sync)(struct AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag);
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     uint8_t inbuf[8192]; /* input buffer */
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     int channels;
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     int sample_rate;
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     int bit_rate;
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     int samples;
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-    uint8_t stream_type;
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 } AACAC3ParseContext;
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 int ff_aac_ac3_parse(AVCodecParserContext *s1,
... ...
@@ -23,7 +23,6 @@
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 #include "parser.h"
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 #include "aac_ac3_parser.h"
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 #include "bitstream.h"
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-#include "ac3.h"
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 #define AAC_HEADER_SIZE 7
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@@ -39,7 +38,7 @@ static const int aac_channels[8] = {
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 };
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-static int aac_sync(AACAC3ParseContext *hdr_info)
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+static int aac_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
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 {
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     GetBitContext bits;
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     int size, rdb, ch, sr;
... ...
@@ -77,6 +76,7 @@ static int aac_sync(AACAC3ParseContext *hdr_info)
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     hdr_info->sample_rate = aac_sample_rates[sr];
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     hdr_info->samples = (rdb + 1) * 1024;
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     hdr_info->bit_rate = size * 8 * hdr_info->sample_rate / hdr_info->samples;
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+    *flag = FRAME_COMPLETE;
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     return size;
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 }
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@@ -84,7 +84,6 @@ static int aac_sync(AACAC3ParseContext *hdr_info)
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 static av_cold int aac_parse_init(AVCodecParserContext *s1)
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 {
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     AACAC3ParseContext *s = s1->priv_data;
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-    s->stream_type = EAC3_STREAM_TYPE_INDEPENDENT;
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     s->inbuf_ptr = s->inbuf;
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     s->header_size = AAC_HEADER_SIZE;
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     s->sync = aac_sync;
... ...
@@ -123,7 +123,7 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
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     return 0;
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 }
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-static int ac3_sync(AACAC3ParseContext *hdr_info)
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+static int ac3_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
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 {
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     int err;
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     AC3HeaderInfo hdr;
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@@ -137,6 +137,18 @@ static int ac3_sync(AACAC3ParseContext *hdr_info)
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     hdr_info->bit_rate = hdr.bit_rate;
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     hdr_info->channels = hdr.channels;
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     hdr_info->samples = AC3_FRAME_SIZE;
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+
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+    switch(hdr.stream_type){
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+        case EAC3_STREAM_TYPE_INDEPENDENT:
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+            *flag = FRAME_START;
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+            break;
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+        case EAC3_STREAM_TYPE_DEPENDENT:
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+            *flag = FRAME_CONTINUATION;
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+            break;
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+        case EAC3_STREAM_TYPE_AC3_CONVERT:
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+            *flag = FRAME_COMPLETE;
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+            break;
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+    }
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     return hdr.frame_size;
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 }
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