/*
- * Common AAC and AC3 parser
+ * Common AAC and AC-3 parser
* Copyright (c) 2003 Fabrice Bellard.
* Copyright (c) 2003 Michael Niedermayer.
*
/* update codec info */
avctx->sample_rate = s->sample_rate;
- /* allow downmixing to stereo (or mono for AC3) */
+ /* allow downmixing to stereo (or mono for AC-3) */
if(avctx->request_channels > 0 &&
avctx->request_channels < s->channels &&
(avctx->request_channels <= 2 ||
/*
- * Common AAC and AC3 parser prototypes
+ * Common AAC and AC-3 parser prototypes
* Copyright (c) 2003 Fabrice Bellard.
* Copyright (c) 2003 Michael Niedermayer.
*
/*
- * Common code between AC3 encoder and decoder
+ * Common code between the AC-3 encoder and decoder
* Copyright (c) 2000 Fabrice Bellard.
*
* This file is part of FFmpeg.
/**
* @file ac3.c
- * Common code between AC3 encoder and decoder.
+ * Common code between the AC-3 encoder and decoder.
*/
#include "avcodec.h"
} while (end > band_start_tab[j++]);
}
-/* AC3 bit allocation. The algorithm is the one described in the AC3
+/* AC-3 bit allocation. The algorithm is the one described in the AC-3
spec. */
void ac3_parametric_bit_allocation(AC3BitAllocParameters *s, uint8_t *bap,
int8_t *exp, int start, int end,
/*
- * Common code between AC3 encoder and decoder
+ * Common code between the AC-3 encoder and decoder
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
*
* This file is part of FFmpeg.
/**
* @file ac3.h
- * Common code between AC3 encoder and decoder.
+ * Common code between the AC-3 encoder and decoder.
*/
#ifndef FFMPEG_AC3_H
#define AC3_MAX_CODED_FRAME_SIZE 3840 /* in bytes */
#define AC3_MAX_CHANNELS 6 /* including LFE channel */
-#define NB_BLOCKS 6 /* number of PCM blocks inside an AC3 frame */
+#define NB_BLOCKS 6 /* number of PCM blocks inside an AC-3 frame */
#define AC3_FRAME_SIZE (NB_BLOCKS * 256)
/* exponent encoding strategy */
/*
- * AC3 parser
+ * AC-3 parser
* Copyright (c) 2003 Fabrice Bellard.
* Copyright (c) 2003 Michael Niedermayer.
*
/*
- * AC3 parser prototypes
+ * AC-3 parser prototypes
* Copyright (c) 2003 Fabrice Bellard.
* Copyright (c) 2003 Michael Niedermayer.
*
/**
* Parse the 'sync info' and 'bit stream info' from the AC-3 bitstream.
* GetBitContext within AC3DecodeContext must point to
- * start of the synchronized ac3 bitstream.
+ * the start of the synchronized AC-3 bitstream.
*/
static int ac3_parse_header(AC3DecodeContext *s)
{
}
/**
- * Common function to parse AC3 or E-AC3 frame header
+ * Common function to parse AC-3 or E-AC-3 frame header
*/
static int parse_frame_header(AC3DecodeContext *s)
{
/*
- * Common code between AC3 and E-AC3 decoder
+ * Common code between the AC-3 and E-AC-3 decoders
* Copyright (c) 2007 Bartlomiej Wolowiec <bartek.wolowiec@gmail.com>
*
* This file is part of FFmpeg.
/**
* @file ac3.h
- * Common code between AC3 and E-AC3 decoder.
+ * Common code between the AC-3 and E-AC-3 decoders.
*/
#ifndef FFMPEG_AC3DEC_H
/*
- * AC3 and E-AC3 decoder tables
+ * AC-3 and E-AC-3 decoder tables
* Copyright (c) 2007 Bartlomiej Wolowiec <bartek.wolowiec@gmail.com>
*
* This file is part of FFmpeg.
/**
* @file ac3dec_data.c
- * tables taken directly from AC3 spec.
+ * tables taken directly from the AC-3 spec.
*/
#include "ac3dec_data.h"
/*
- * AC3 and E-AC3 decoder tables
+ * AC-3 and E-AC-3 decoder tables
* Copyright (c) 2007 Bartlomiej Wolowiec <bartek.wolowiec@gmail.com>
*
* This file is part of FFmpeg.
/*
- * The simplest AC3 encoder
+ * The simplest AC-3 encoder
* Copyright (c) 2000 Fabrice Bellard.
*
* This file is part of FFmpeg.
/**
* @file ac3enc.c
- * The simplest AC3 encoder.
+ * The simplest AC-3 encoder.
*/
//#define DEBUG
//#define DEBUG_BITALLOC
return 0;
}
-/* output the AC3 frame header */
+/* output the AC-3 frame header */
static void output_frame_header(AC3EncodeContext *s, unsigned char *frame)
{
init_put_bits(&s->pb, frame, AC3_MAX_CODED_FRAME_SIZE);
return v & ((1 << qbits)-1);
}
-/* Output one audio block. There are NB_BLOCKS audio blocks in one AC3
+/* Output one audio block. There are NB_BLOCKS audio blocks in one AC-3
frame */
static void output_audio_block(AC3EncodeContext *s,
uint8_t exp_strategy[AC3_MAX_CHANNELS],
/*
- * AC3 tables
+ * AC-3 tables
* copyright (c) 2001 Fabrice Bellard
*
* This file is part of FFmpeg.
/**
* @file ac3tab.c
- * tables taken directly from AC3 spec.
+ * tables taken directly from the AC-3 spec.
*/
#include "ac3tab.h"
160, 192, 224, 256, 320, 384, 448, 512, 576, 640
};
-/* AC3 MDCT window */
+/* AC-3 MDCT window */
/* MDCT window */
const int16_t ff_ac3_window[256] = {
/*
- * AC3 tables
+ * AC-3 tables
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
*
* This file is part of FFmpeg.
s->filter_channels = s->output_channels;
/*
- * ac3 output is the only case where filter_channels could be greater than 2.
+ * AC-3 output is the only case where filter_channels could be greater than 2.
* input channels can't be greater than 2, so resample the 2 channels and then
* expand to 6 channels after the resampling.
*/
id = stream->id;
if (id < 0xc0) {
- /* special case for private streams (AC3 use that) */
+ /* special case for private streams (AC-3 uses that) */
if (private_stream_coded)
continue;
private_stream_coded = 1;
}
if (stream->id < 0xc0) {
- /* AC3/LPCM private data header */
+ /* AC-3/LPCM private data header */
buf_index += 4;
if (stream->id >= 0xa0) {
int n;
put_byte(ctx->pb, stream->lpcm_header[1]);
put_byte(ctx->pb, stream->lpcm_header[2]);
} else if (id >= 0x40) {
- /* AC3 */
+ /* AC-3 */
put_byte(ctx->pb, nb_frames);
put_be16(ctx->pb, trailer_size+1);
}
case 8000:
fscode = 3;
}
- put_be16(s, fscode); /* codec additional info, for AC3, seems
+ put_be16(s, fscode); /* codec additional info, for AC-3, seems
to be a frequency code */
/* special hack to compensate rounding errors... */
if (coded_frame_size == 557)
write_packet_header(s, stream, size, !!(flags & PKT_FLAG_KEY));
- /* for AC3, the words seems to be reversed */
+ /* for AC-3, the words seem to be reversed */
for(i=0;i<size;i+=2) {
buf1[i] = buf[i+1];
buf1[i+1] = buf[i];
projects / frescor / ffmpeg.git / commitdiff