diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/pcm.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/pcm.c | 80 |
1 files changed, 40 insertions, 40 deletions
diff --git a/src/libffmpeg/libavcodec/pcm.c b/src/libffmpeg/libavcodec/pcm.c index e3a81a590..0b4dd1c86 100644 --- a/src/libffmpeg/libavcodec/pcm.c +++ b/src/libffmpeg/libavcodec/pcm.c @@ -14,61 +14,61 @@ * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ - + /** * @file pcm.c * PCM codecs */ - + #include "avcodec.h" #include "bitstream.h" // for ff_reverse /* from g711.c by SUN microsystems (unrestricted use) */ -#define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */ -#define QUANT_MASK (0xf) /* Quantization field mask. */ -#define NSEGS (8) /* Number of A-law segments. */ -#define SEG_SHIFT (4) /* Left shift for segment number. */ -#define SEG_MASK (0x70) /* Segment field mask. */ +#define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */ +#define QUANT_MASK (0xf) /* Quantization field mask. */ +#define NSEGS (8) /* Number of A-law segments. */ +#define SEG_SHIFT (4) /* Left shift for segment number. */ +#define SEG_MASK (0x70) /* Segment field mask. */ -#define BIAS (0x84) /* Bias for linear code. */ +#define BIAS (0x84) /* Bias for linear code. */ /* * alaw2linear() - Convert an A-law value to 16-bit linear PCM * */ -static int alaw2linear(unsigned char a_val) +static int alaw2linear(unsigned char a_val) { - int t; - int seg; + int t; + int seg; - a_val ^= 0x55; + a_val ^= 0x55; - t = a_val & QUANT_MASK; - seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT; - if(seg) t= (t + t + 1 + 32) << (seg + 2); - else t= (t + t + 1 ) << 3; + t = a_val & QUANT_MASK; + seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT; + if(seg) t= (t + t + 1 + 32) << (seg + 2); + else t= (t + t + 1 ) << 3; - return ((a_val & SIGN_BIT) ? t : -t); + return ((a_val & SIGN_BIT) ? t : -t); } -static int ulaw2linear(unsigned char u_val) +static int ulaw2linear(unsigned char u_val) { - int t; + int t; - /* Complement to obtain normal u-law value. */ - u_val = ~u_val; + /* Complement to obtain normal u-law value. */ + u_val = ~u_val; - /* - * Extract and bias the quantization bits. Then - * shift up by the segment number and subtract out the bias. - */ - t = ((u_val & QUANT_MASK) << 3) + BIAS; - t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT; + /* + * Extract and bias the quantization bits. Then + * shift up by the segment number and subtract out the bias. + */ + t = ((u_val & QUANT_MASK) << 3) + BIAS; + t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT; - return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS)); + return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS)); } /* 16384 entries per table */ @@ -78,9 +78,9 @@ static int linear_to_alaw_ref = 0; static uint8_t *linear_to_ulaw = NULL; static int linear_to_ulaw_ref = 0; -static void build_xlaw_table(uint8_t *linear_to_xlaw, +static void build_xlaw_table(uint8_t *linear_to_xlaw, int (*xlaw2linear)(unsigned char), - int mask) + int mask) { int i, j, v, v1, v2; @@ -127,7 +127,7 @@ static int pcm_encode_init(AVCodecContext *avctx) default: break; } - + switch(avctx->codec->id) { case CODEC_ID_PCM_S32LE: case CODEC_ID_PCM_S32BE: @@ -160,7 +160,7 @@ static int pcm_encode_init(AVCodecContext *avctx) avctx->coded_frame= avcodec_alloc_frame(); avctx->coded_frame->key_frame= 1; - + return 0; } @@ -209,7 +209,7 @@ static inline void encode_from16(int bps, int le, int us, } static int pcm_encode_frame(AVCodecContext *avctx, - unsigned char *frame, int buf_size, void *data) + unsigned char *frame, int buf_size, void *data) { int n, sample_size, v; short *samples; @@ -397,8 +397,8 @@ static inline void decode_to16(int bps, int le, int us, } static int pcm_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) + void *data, int *data_size, + uint8_t *buf, int buf_size) { PCMDecode *s = avctx->priv_data; int n; @@ -509,9 +509,9 @@ AVCodec name ## _encoder = { \ CODEC_TYPE_AUDIO, \ id, \ 0, \ - pcm_encode_init, \ - pcm_encode_frame, \ - pcm_encode_close, \ + pcm_encode_init, \ + pcm_encode_frame, \ + pcm_encode_close, \ NULL, \ }; \ AVCodec name ## _decoder = { \ @@ -519,7 +519,7 @@ AVCodec name ## _decoder = { \ CODEC_TYPE_AUDIO, \ id, \ sizeof(PCMDecode), \ - pcm_decode_init, \ + pcm_decode_init, \ NULL, \ NULL, \ pcm_decode_frame, \ |