diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/mpegaudio.h')
-rw-r--r-- | contrib/ffmpeg/libavcodec/mpegaudio.h | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/contrib/ffmpeg/libavcodec/mpegaudio.h b/contrib/ffmpeg/libavcodec/mpegaudio.h deleted file mode 100644 index 3eadf92a8..000000000 --- a/contrib/ffmpeg/libavcodec/mpegaudio.h +++ /dev/null @@ -1,106 +0,0 @@ -/* - * copyright (c) 2001 Fabrice Bellard - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file mpegaudio.h - * mpeg audio declarations for both encoder and decoder. - */ - -/* max frame size, in samples */ -#define MPA_FRAME_SIZE 1152 - -/* max compressed frame size */ -#define MPA_MAX_CODED_FRAME_SIZE 1792 - -#define MPA_MAX_CHANNELS 2 - -#define SBLIMIT 32 /* number of subbands */ - -#define MPA_STEREO 0 -#define MPA_JSTEREO 1 -#define MPA_DUAL 2 -#define MPA_MONO 3 - -/* header + layer + bitrate + freq + lsf/mpeg25 */ -#define SAME_HEADER_MASK \ - (0xffe00000 | (3 << 17) | (0xf << 12) | (3 << 10) | (3 << 19)) - -/* define USE_HIGHPRECISION to have a bit exact (but slower) mpeg - audio decoder */ - -#ifdef USE_HIGHPRECISION -#define FRAC_BITS 23 /* fractional bits for sb_samples and dct */ -#define WFRAC_BITS 16 /* fractional bits for window */ -#else -#define FRAC_BITS 15 /* fractional bits for sb_samples and dct */ -#define WFRAC_BITS 14 /* fractional bits for window */ -#endif - -#if defined(USE_HIGHPRECISION) && defined(CONFIG_AUDIO_NONSHORT) -typedef int32_t OUT_INT; -#define OUT_MAX INT32_MAX -#define OUT_MIN INT32_MIN -#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 31) -#else -typedef int16_t OUT_INT; -#define OUT_MAX INT16_MAX -#define OUT_MIN INT16_MIN -#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15) -#endif - -#if FRAC_BITS <= 15 -typedef int16_t MPA_INT; -#else -typedef int32_t MPA_INT; -#endif - -int l2_select_table(int bitrate, int nb_channels, int freq, int lsf); -int mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate); -void ff_mpa_synth_init(MPA_INT *window); -void ff_mpa_synth_filter(MPA_INT *synth_buf_ptr, int *synth_buf_offset, - MPA_INT *window, int *dither_state, - OUT_INT *samples, int incr, - int32_t sb_samples[SBLIMIT]); - -extern const uint16_t mpa_bitrate_tab[2][3][15]; -extern const uint16_t mpa_freq_tab[3]; -extern const unsigned char *alloc_tables[5]; -extern const double enwindow[512]; -extern const int sblimit_table[5]; -extern const int quant_steps[17]; -extern const int quant_bits[17]; -extern const int32_t mpa_enwindow[257]; - -/* 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; -} |