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Code Issues Releases Activity

using stream type in eac3 parser

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Originally committed as revision 12570 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Bartlomiej Wolowiec 2008-03-24 21:25:49 +00:00
parent b4e806b2b9
commit 4e6eeaf019
6 changed files with 18 additions and 1 deletions
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1
libavcodec/aac_ac3_parser.h
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@ -37,6 +37,7 @@ typedef struct AACAC3ParseContext {
int sample_rate;
int bit_rate;
int samples;
uint8_t stream_type;
} AACAC3ParseContext;
int ff_aac_ac3_parse(AVCodecParserContext *s1,

1
libavcodec/aac_parser.c
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@ -83,6 +83,7 @@ static int aac_sync(AACAC3ParseContext *hdr_info)
static av_cold int aac_parse_init(AVCodecParserContext *s1)
{
AACAC3ParseContext *s = s1->priv_data;
s->stream_type = 0;
s->inbuf_ptr = s->inbuf;
s->header_size = AAC_HEADER_SIZE;
s->sync = aac_sync;

7
libavcodec/ac3.h
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@ -84,6 +84,7 @@ typedef struct {
uint8_t bitstream_id;
uint8_t channel_mode;
uint8_t lfe_on;
uint8_t stream_type;
/** @} */
/** @defgroup derived Derived values
@ -97,6 +98,12 @@ typedef struct {
/** @} */
} AC3HeaderInfo;
typedef enum {
EAC3_STREAM_TYPE_INDEPENDENT = 0,
EAC3_STREAM_TYPE_DEPENDENT,
EAC3_STREAM_TYPE_AC3_CONVERT,
EAC3_STREAM_TYPE_RESERVED
} EAC3StreamType;
void ac3_common_init(void);

6
libavcodec/ac3_parser.c
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@ -84,10 +84,14 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
hdr->bit_rate = (ff_ac3_bitrate_tab[frame_size_code>>1] * 1000) >> hdr->sr_shift;
hdr->channels = ff_ac3_channels_tab[hdr->channel_mode] + hdr->lfe_on;
hdr->frame_size = ff_ac3_frame_size_tab[frame_size_code][hdr->sr_code] * 2;
hdr->stream_type = 0;
} else {
/* Enhanced AC-3 */
hdr->crc1 = 0;
skip_bits(&gbc, 2); // skip stream type
hdr->stream_type = get_bits(&gbc, 2);
if(hdr->stream_type == 3)
return AC3_PARSE_ERROR_STREAM_TYPE;
skip_bits(&gbc, 3); // skip substream id
hdr->frame_size = (get_bits(&gbc, 11) + 1) << 1;

1
libavcodec/ac3_parser.h
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@ -30,6 +30,7 @@ typedef enum {
AC3_PARSE_ERROR_BSID = -2,
AC3_PARSE_ERROR_SAMPLE_RATE = -3,
AC3_PARSE_ERROR_FRAME_SIZE = -4,
AC3_PARSE_ERROR_STREAM_TYPE = -5,
} AC3ParseError;
/**

3
libavcodec/ac3dec.c
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@ -1151,6 +1151,9 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
case AC3_PARSE_ERROR_FRAME_SIZE:
av_log(avctx, AV_LOG_ERROR, "invalid frame size\n");
break;
case AC3_PARSE_ERROR_STREAM_TYPE:
av_log(avctx, AV_LOG_ERROR, "invalid stream type\n");
break;
default:
av_log(avctx, AV_LOG_ERROR, "invalid header\n");
break;