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removal of stream_type in AACAC3ParseContext and adding AACAC3FrameFlag

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Originally committed as revision 12622 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Bartlomiej Wolowiec 2008-03-28 19:59:58 +00:00
parent 5610f20ed4
commit be1e2a2bfa
4 changed files with 24 additions and 7 deletions
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3
libavcodec/aac_ac3_parser.c
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@ -29,6 +29,7 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
const uint8_t *buf, int buf_size) const uint8_t *buf, int buf_size)
{ {
AACAC3ParseContext *s = s1->priv_data; AACAC3ParseContext *s = s1->priv_data;
AACAC3FrameFlag frame_flag;
const uint8_t *buf_ptr; const uint8_t *buf_ptr;
int len; int len;
@ -50,7 +51,7 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
if (s->frame_size == 0) { if (s->frame_size == 0) {
if ((s->inbuf_ptr - s->inbuf) == s->header_size) { if ((s->inbuf_ptr - s->inbuf) == s->header_size) {
len = s->sync(s); len = s->sync(s, &frame_flag);
if (len == 0) { if (len == 0) {
/* no sync found : move by one byte (inefficient, but simple!) */ /* no sync found : move by one byte (inefficient, but simple!) */
memmove(s->inbuf, s->inbuf + 1, s->header_size - 1); memmove(s->inbuf, s->inbuf + 1, s->header_size - 1);

9
libavcodec/aac_ac3_parser.h
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@ -26,18 +26,23 @@
#include <stdint.h> #include <stdint.h>
#include "avcodec.h" #include "avcodec.h"
typedef enum{
FRAME_COMPLETE, ///< Complete frame, ends previous frame
FRAME_START, ///< Frame start, ends previous frame
FRAME_CONTINUATION ///< Part of the previous frame
}AACAC3FrameFlag;
typedef struct AACAC3ParseContext { typedef struct AACAC3ParseContext {
uint8_t *inbuf_ptr; uint8_t *inbuf_ptr;
int frame_size; int frame_size;
int header_size; int header_size;
int (*sync)(struct AACAC3ParseContext *hdr_info); int (*sync)(struct AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag);
uint8_t inbuf[8192]; /* input buffer */ uint8_t inbuf[8192]; /* input buffer */
int channels; int channels;
int sample_rate; int sample_rate;
int bit_rate; int bit_rate;
int samples; int samples;
uint8_t stream_type;
} AACAC3ParseContext; } AACAC3ParseContext;
int ff_aac_ac3_parse(AVCodecParserContext *s1, int ff_aac_ac3_parse(AVCodecParserContext *s1,

5
libavcodec/aac_parser.c
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@ -23,7 +23,6 @@
#include "parser.h" #include "parser.h"
#include "aac_ac3_parser.h" #include "aac_ac3_parser.h"
#include "bitstream.h" #include "bitstream.h"
#include "ac3.h"
#define AAC_HEADER_SIZE 7 #define AAC_HEADER_SIZE 7
@ -39,7 +38,7 @@ static const int aac_channels[8] = {
}; };
static int aac_sync(AACAC3ParseContext *hdr_info) static int aac_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
{ {
GetBitContext bits; GetBitContext bits;
int size, rdb, ch, sr; int size, rdb, ch, sr;
@ -77,6 +76,7 @@ static int aac_sync(AACAC3ParseContext *hdr_info)
hdr_info->sample_rate = aac_sample_rates[sr]; hdr_info->sample_rate = aac_sample_rates[sr];
hdr_info->samples = (rdb + 1) * 1024; hdr_info->samples = (rdb + 1) * 1024;
hdr_info->bit_rate = size * 8 * hdr_info->sample_rate / hdr_info->samples; hdr_info->bit_rate = size * 8 * hdr_info->sample_rate / hdr_info->samples;
*flag = FRAME_COMPLETE;
return size; return size;
} }
@ -84,7 +84,6 @@ static int aac_sync(AACAC3ParseContext *hdr_info)
static av_cold int aac_parse_init(AVCodecParserContext *s1) static av_cold int aac_parse_init(AVCodecParserContext *s1)
{ {
AACAC3ParseContext *s = s1->priv_data; AACAC3ParseContext *s = s1->priv_data;
s->stream_type = EAC3_STREAM_TYPE_INDEPENDENT;
s->inbuf_ptr = s->inbuf; s->inbuf_ptr = s->inbuf;
s->header_size = AAC_HEADER_SIZE; s->header_size = AAC_HEADER_SIZE;
s->sync = aac_sync; s->sync = aac_sync;

14
libavcodec/ac3_parser.c
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@ -123,7 +123,7 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
return 0; return 0;
} }
static int ac3_sync(AACAC3ParseContext *hdr_info) static int ac3_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
{ {
int err; int err;
AC3HeaderInfo hdr; AC3HeaderInfo hdr;
@ -137,6 +137,18 @@ static int ac3_sync(AACAC3ParseContext *hdr_info)
hdr_info->bit_rate = hdr.bit_rate; hdr_info->bit_rate = hdr.bit_rate;
hdr_info->channels = hdr.channels; hdr_info->channels = hdr.channels;
hdr_info->samples = AC3_FRAME_SIZE; hdr_info->samples = AC3_FRAME_SIZE;
switch(hdr.stream_type){
case EAC3_STREAM_TYPE_INDEPENDENT:
*flag = FRAME_START;
break;
case EAC3_STREAM_TYPE_DEPENDENT:
*flag = FRAME_CONTINUATION;
break;
case EAC3_STREAM_TYPE_AC3_CONVERT:
*flag = FRAME_COMPLETE;
break;
}
return hdr.frame_size; return hdr.frame_size;
} }