chromium/third_party/ffmpeg/libavcodec/pcm.c

/*
 * PCM codecs
 * 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
 * PCM codecs
 */

#include "config.h"
#include "config_components.h"
#include "libavutil/attributes.h"
#include "libavutil/float_dsp.h"
#include "libavutil/mem.h"
#include "libavutil/reverse.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "encode.h"
#include "pcm_tablegen.h"

static av_cold int pcm_encode_init(AVCodecContext *avctx)
{ … }

/**
 * Write PCM samples macro
 * @param type   Datatype of native machine format
 * @param endian bytestream_put_xxx() suffix
 * @param src    Source pointer (variable name)
 * @param dst    Destination pointer (variable name)
 * @param n      Total number of samples (variable name)
 * @param shift  Bitshift (bits)
 * @param offset Sample value offset
 */
#define ENCODE(type, endian, src, dst, n, shift, offset) …

#define ENCODE_PLANAR(type, endian, dst, n, shift, offset) …

static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
                            const AVFrame *frame, int *got_packet_ptr)
{ … }

PCMDecode;

static av_cold int pcm_decode_init(AVCodecContext *avctx)
{ … }

/**
 * Read PCM samples macro
 * @param size   Data size of native machine format
 * @param endian bytestream_get_xxx() endian suffix
 * @param src    Source pointer (variable name)
 * @param dst    Destination pointer (variable name)
 * @param n      Total number of samples (variable name)
 * @param shift  Bitshift (bits)
 * @param offset Sample value offset
 */
#define DECODE(size, endian, src, dst, n, shift, offset) …

#define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) …

static int pcm_decode_frame(AVCodecContext *avctx, AVFrame *frame,
            int *got_frame_ptr, AVPacket *avpkt)
{ … }

#define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_) …
#define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) …

#define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) …
#define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) …
#define PCM_ENCODER(id, sample_fmt, name, long_name) …

#define PCM_DECODER_0(id, sample_fmt, name, long_name) …
#define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) …

#define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) …
#define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) …
#define PCM_DECODER(id, sample_fmt, name, long_name) …

#define PCM_CODEC(id, sample_fmt_, name, long_name_) …

/* Note: Do not forget to add new entries to the Makefile as well. */
PCM_CODEC  (PCM_ALAW,         AV_SAMPLE_FMT_S16, pcm_alaw,         "PCM A-law / G.711 A-law");
PCM_DECODER(PCM_F16LE,        AV_SAMPLE_FMT_FLT, pcm_f16le,        "PCM 16.8 floating point little-endian");
PCM_DECODER(PCM_F24LE,        AV_SAMPLE_FMT_FLT, pcm_f24le,        "PCM 24.0 floating point little-endian");
PCM_CODEC(…);
PCM_CODEC  (PCM_F32LE,        AV_SAMPLE_FMT_FLT, pcm_f32le,        "PCM 32-bit floating point little-endian");
PCM_CODEC(…);
PCM_CODEC(…);
PCM_DECODER(PCM_LXF,          AV_SAMPLE_FMT_S32P,pcm_lxf,          "PCM signed 20-bit little-endian planar");
PCM_CODEC  (PCM_MULAW,        AV_SAMPLE_FMT_S16, pcm_mulaw,        "PCM mu-law / G.711 mu-law");
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC  (PCM_S16BE,        AV_SAMPLE_FMT_S16, pcm_s16be,        "PCM signed 16-bit big-endian");
PCM_CODEC(…);
PCM_CODEC  (PCM_S16LE,        AV_SAMPLE_FMT_S16, pcm_s16le,        "PCM signed 16-bit little-endian");
PCM_CODEC(…);
PCM_CODEC  (PCM_S24BE,        AV_SAMPLE_FMT_S32, pcm_s24be,        "PCM signed 24-bit big-endian");
PCM_CODEC(…);
PCM_CODEC  (PCM_S24LE,        AV_SAMPLE_FMT_S32, pcm_s24le,        "PCM signed 24-bit little-endian");
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC  (PCM_S32LE,        AV_SAMPLE_FMT_S32, pcm_s32le,        "PCM signed 32-bit little-endian");
PCM_CODEC(…);
PCM_CODEC  (PCM_U8,           AV_SAMPLE_FMT_U8,  pcm_u8,           "PCM unsigned 8-bit");
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC(…);
PCM_CODEC(…);
PCM_DECODER(PCM_SGA,          AV_SAMPLE_FMT_U8,  pcm_sga,          "PCM SGA");