diff options
author | Mans Rullgard <mans@mansr.com> | 2011-05-19 16:44:11 +0400 |
---|---|---|
committer | Mans Rullgard <mans@mansr.com> | 2011-05-20 14:05:07 +0400 |
commit | 0199e00bc80a55aacf7ecd393bf32dcd64e06739 (patch) | |
tree | fc1744a173ca698ac97881820abe68f6d7d0a043 /libavcodec | |
parent | 984ece7503597d30e6f3bdeb67e337ea1616f880 (diff) |
mpegaudio: move all header parsing to mpegaudiodecheader.[ch]
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavcodec')
-rw-r--r-- | libavcodec/mp3_header_compress_bsf.c | 2 | ||||
-rw-r--r-- | libavcodec/mp3_header_decompress_bsf.c | 2 | ||||
-rw-r--r-- | libavcodec/mpegaudio.h | 38 | ||||
-rw-r--r-- | libavcodec/mpegaudio_parser.c | 39 | ||||
-rw-r--r-- | libavcodec/mpegaudiodecheader.c | 37 | ||||
-rw-r--r-- | libavcodec/mpegaudiodecheader.h | 41 |
6 files changed, 79 insertions, 80 deletions
diff --git a/libavcodec/mp3_header_compress_bsf.c b/libavcodec/mp3_header_compress_bsf.c index c880e5e53d..bc3659ef3e 100644 --- a/libavcodec/mp3_header_compress_bsf.c +++ b/libavcodec/mp3_header_compress_bsf.c @@ -20,7 +20,7 @@ #include "libavutil/intreadwrite.h" #include "avcodec.h" -#include "mpegaudio.h" +#include "mpegaudiodecheader.h" static int mp3_header_compress(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, diff --git a/libavcodec/mp3_header_decompress_bsf.c b/libavcodec/mp3_header_decompress_bsf.c index b4b4167620..3f3074286a 100644 --- a/libavcodec/mp3_header_decompress_bsf.c +++ b/libavcodec/mp3_header_decompress_bsf.c @@ -20,7 +20,7 @@ #include "libavutil/intreadwrite.h" #include "avcodec.h" -#include "mpegaudio.h" +#include "mpegaudiodecheader.h" #include "mpegaudiodata.h" diff --git a/libavcodec/mpegaudio.h b/libavcodec/mpegaudio.h index a46ecc5a9f..b55680100b 100644 --- a/libavcodec/mpegaudio.h +++ b/libavcodec/mpegaudio.h @@ -30,7 +30,7 @@ # define CONFIG_FLOAT 0 #endif -#include "avcodec.h" +#include <stdint.h> /* max frame size, in samples */ #define MPA_FRAME_SIZE 1152 @@ -47,8 +47,6 @@ #define MPA_DUAL 2 #define MPA_MONO 3 -#define MP3_MASK 0xFFFE0CCF - #ifndef FRAC_BITS #define FRAC_BITS 23 /* fractional bits for sb_samples and dct */ #define WFRAC_BITS 16 /* fractional bits for window */ @@ -72,40 +70,6 @@ typedef int32_t MPA_INT; typedef int16_t OUT_INT; #endif -#define MPA_DECODE_HEADER \ - int frame_size; \ - int error_protection; \ - int layer; \ - int sample_rate; \ - int sample_rate_index; /* between 0 and 8 */ \ - int bit_rate; \ - int nb_channels; \ - int mode; \ - int mode_ext; \ - int lsf; - -typedef struct MPADecodeHeader { - MPA_DECODE_HEADER -} MPADecodeHeader; - int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf); -int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate, int *channels, int *frame_size, int *bitrate); - -/* fast header check for resync */ -static inline int ff_mpa_check_header(uint32_t header){ - /* header */ - if ((header & 0xffe00000) != 0xffe00000) - return -1; - /* layer check */ - if ((header & (3<<17)) == 0) - return -1; - /* bit rate */ - if ((header & (0xf<<12)) == 0xf<<12) - return -1; - /* frequency */ - if ((header & (3<<10)) == 3<<10) - return -1; - return 0; -} #endif /* AVCODEC_MPEGAUDIO_H */ diff --git a/libavcodec/mpegaudio_parser.c b/libavcodec/mpegaudio_parser.c index 7cfd107d53..06d46f2152 100644 --- a/libavcodec/mpegaudio_parser.c +++ b/libavcodec/mpegaudio_parser.c @@ -38,45 +38,6 @@ typedef struct MpegAudioParseContext { #define SAME_HEADER_MASK \ (0xffe00000 | (3 << 17) | (3 << 10) | (3 << 19)) -/* useful helper to get mpeg audio stream infos. Return -1 if error in - header, otherwise the coded frame size in bytes */ -int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate, int *channels, int *frame_size, int *bit_rate) -{ - MPADecodeHeader s1, *s = &s1; - - if (ff_mpa_check_header(head) != 0) - return -1; - - if (ff_mpegaudio_decode_header(s, head) != 0) { - return -1; - } - - switch(s->layer) { - case 1: - avctx->codec_id = CODEC_ID_MP1; - *frame_size = 384; - break; - case 2: - avctx->codec_id = CODEC_ID_MP2; - *frame_size = 1152; - break; - default: - case 3: - avctx->codec_id = CODEC_ID_MP3; - if (s->lsf) - *frame_size = 576; - else - *frame_size = 1152; - break; - } - - *sample_rate = s->sample_rate; - *channels = s->nb_channels; - *bit_rate = s->bit_rate; - avctx->sub_id = s->layer; - return s->frame_size; -} - static int mpegaudio_parse(AVCodecParserContext *s1, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, diff --git a/libavcodec/mpegaudiodecheader.c b/libavcodec/mpegaudiodecheader.c index a0bd4fcee6..be7abc619d 100644 --- a/libavcodec/mpegaudiodecheader.c +++ b/libavcodec/mpegaudiodecheader.c @@ -108,3 +108,40 @@ int ff_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header) #endif return 0; } + +int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate, int *channels, int *frame_size, int *bit_rate) +{ + MPADecodeHeader s1, *s = &s1; + + if (ff_mpa_check_header(head) != 0) + return -1; + + if (ff_mpegaudio_decode_header(s, head) != 0) { + return -1; + } + + switch(s->layer) { + case 1: + avctx->codec_id = CODEC_ID_MP1; + *frame_size = 384; + break; + case 2: + avctx->codec_id = CODEC_ID_MP2; + *frame_size = 1152; + break; + default: + case 3: + avctx->codec_id = CODEC_ID_MP3; + if (s->lsf) + *frame_size = 576; + else + *frame_size = 1152; + break; + } + + *sample_rate = s->sample_rate; + *channels = s->nb_channels; + *bit_rate = s->bit_rate; + avctx->sub_id = s->layer; + return s->frame_size; +} diff --git a/libavcodec/mpegaudiodecheader.h b/libavcodec/mpegaudiodecheader.h index 41a491b986..2991595b02 100644 --- a/libavcodec/mpegaudiodecheader.h +++ b/libavcodec/mpegaudiodecheader.h @@ -27,13 +27,50 @@ #ifndef AVCODEC_MPEGAUDIODECHEADER_H #define AVCODEC_MPEGAUDIODECHEADER_H -#include "libavutil/common.h" -#include "mpegaudio.h" +#include "avcodec.h" +#define MP3_MASK 0xFFFE0CCF + +#define MPA_DECODE_HEADER \ + int frame_size; \ + int error_protection; \ + int layer; \ + int sample_rate; \ + int sample_rate_index; /* between 0 and 8 */ \ + int bit_rate; \ + int nb_channels; \ + int mode; \ + int mode_ext; \ + int lsf; + +typedef struct MPADecodeHeader { + MPA_DECODE_HEADER +} MPADecodeHeader; /* header decoding. MUST check the header before because no consistency check is done there. Return 1 if free format found and that the frame size must be computed externally */ int ff_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header); +/* useful helper to get mpeg audio stream infos. Return -1 if error in + header, otherwise the coded frame size in bytes */ +int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate, int *channels, int *frame_size, int *bitrate); + +/* fast header check for resync */ +static inline int ff_mpa_check_header(uint32_t header){ + /* header */ + if ((header & 0xffe00000) != 0xffe00000) + return -1; + /* layer check */ + if ((header & (3<<17)) == 0) + return -1; + /* bit rate */ + if ((header & (0xf<<12)) == 0xf<<12) + return -1; + /* frequency */ + if ((header & (3<<10)) == 3<<10) + return -1; + return 0; +} + #endif /* AVCODEC_MPEGAUDIODECHEADER_H */ |