/*

 * 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)

{

    avctx->frame_size = 0;

#if !CONFIG_HARDCODED_TABLES

    switch (avctx->codec->id) {

#define INIT_ONCE(id, name)                                                 \

    case AV_CODEC_ID_PCM_ ## id:                                            \

        if (CONFIG_PCM_ ## id ## _ENCODER) {                                \

            static AVOnce init_static_once = AV_ONCE_INIT;                  \

            ff_thread_once(&init_static_once, pcm_ ## name ## _tableinit);  \

        }                                                                   \

        break

        INIT_ONCE(ALAW,  alaw);

        INIT_ONCE(MULAW, ulaw);

        INIT_ONCE(VIDC,  vidc);

    default:

        break;

    }

#endif

    avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);

    avctx->block_align           = avctx->ch_layout.nb_channels * avctx->bits_per_coded_sample / 8;

    avctx->bit_rate              = avctx->block_align * 8LL * avctx->sample_rate;

    return 0;

}

/**

 * 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)                \

    samples_ ## type = (const type *) src;                              \

    for (; n > 0; n--) {                                                \

        register type v = (*samples_ ## type++ >> shift) + offset;      \

        bytestream_put_ ## endian(&dst, v);                             \

    }

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

    n /= avctx->ch_layout.nb_channels;                                  \

    for (c = 0; c < avctx->ch_layout.nb_channels; c++) {                \

        int i;                                                          \

        samples_ ## type = (const type *) frame->extended_data[c];      \

        for (i = n; i > 0; i--) {                                       \

            register type v = (*samples_ ## type++ >> shift) + offset;  \

            bytestream_put_ ## endian(&dst, v);                         \

        }                                                               \

    }

static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,

                            const AVFrame *frame, int *got_packet_ptr)

{

    int n, c, sample_size, v, ret;

    const short *samples;

    unsigned char *dst;

    const uint8_t *samples_uint8_t;

    const int16_t *samples_int16_t;

    const int32_t *samples_int32_t;

    const int64_t *samples_int64_t;

    const uint16_t *samples_uint16_t;

    const uint32_t *samples_uint32_t;

    sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;

    n           = frame->nb_samples * avctx->ch_layout.nb_channels;

    samples     = (const short *)frame->data[0];

    if ((ret = ff_get_encode_buffer(avctx, avpkt, n * sample_size, 0)) < 0)

        return ret;

    dst = avpkt->data;

    switch (avctx->codec->id) {

    case AV_CODEC_ID_PCM_U32LE:

        ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)

        break;

    case AV_CODEC_ID_PCM_U32BE:

        ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)

        break;

    case AV_CODEC_ID_PCM_S24LE:

        ENCODE(int32_t, le24, samples, dst, n, 8, 0)

        break;

    case AV_CODEC_ID_PCM_S24LE_PLANAR:

        ENCODE_PLANAR(int32_t, le24, dst, n, 8, 0)

        break;

    case AV_CODEC_ID_PCM_S24BE:

        ENCODE(int32_t, be24, samples, dst, n, 8, 0)

        break;

    case AV_CODEC_ID_PCM_U24LE:

        ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)

        break;

    case AV_CODEC_ID_PCM_U24BE:

        ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)

        break;

    case AV_CODEC_ID_PCM_S24DAUD:

        for (; n > 0; n--) {

            uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +

                           (ff_reverse[*samples & 0xff] << 8);

            tmp <<= 4; // sync flags would go here

            bytestream_put_be24(&dst, tmp);

            samples++;

        }

        break;

    case AV_CODEC_ID_PCM_U16LE:

        ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)

        break;

    case AV_CODEC_ID_PCM_U16BE:

        ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)

        break;

    case AV_CODEC_ID_PCM_S8:

        ENCODE(uint8_t, byte, samples, dst, n, 0, -128)

        break;

    case AV_CODEC_ID_PCM_S8_PLANAR:

        ENCODE_PLANAR(uint8_t, byte, dst, n, 0, -128)

        break;

#if HAVE_BIGENDIAN

    case AV_CODEC_ID_PCM_S64LE:

    case AV_CODEC_ID_PCM_F64LE:

        ENCODE(int64_t, le64, samples, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S32LE:

    case AV_CODEC_ID_PCM_F32LE:

        ENCODE(int32_t, le32, samples, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S32LE_PLANAR:

        ENCODE_PLANAR(int32_t, le32, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S16LE:

        ENCODE(int16_t, le16, samples, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S16LE_PLANAR:

        ENCODE_PLANAR(int16_t, le16, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_F64BE:

    case AV_CODEC_ID_PCM_F32BE:

    case AV_CODEC_ID_PCM_S64BE:

    case AV_CODEC_ID_PCM_S32BE:

    case AV_CODEC_ID_PCM_S16BE:

#else

    case AV_CODEC_ID_PCM_S64BE:

    case AV_CODEC_ID_PCM_F64BE:

        ENCODE(int64_t, be64, samples, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_F32BE:

    case AV_CODEC_ID_PCM_S32BE:

        ENCODE(int32_t, be32, samples, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S16BE:

        ENCODE(int16_t, be16, samples, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S16BE_PLANAR:

        ENCODE_PLANAR(int16_t, be16, dst, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_F64LE:

    case AV_CODEC_ID_PCM_F32LE:

    case AV_CODEC_ID_PCM_S64LE:

    case AV_CODEC_ID_PCM_S32LE:

    case AV_CODEC_ID_PCM_S16LE:

#endif /* HAVE_BIGENDIAN */

    case AV_CODEC_ID_PCM_U8:

        memcpy(dst, samples, n * sample_size);

        break;

#if HAVE_BIGENDIAN

    case AV_CODEC_ID_PCM_S16BE_PLANAR:

#else

    case AV_CODEC_ID_PCM_S16LE_PLANAR:

    case AV_CODEC_ID_PCM_S32LE_PLANAR:

#endif /* HAVE_BIGENDIAN */

        n /= avctx->ch_layout.nb_channels;

        for (c = 0; c < avctx->ch_layout.nb_channels; c++) {

            const uint8_t *src = frame->extended_data[c];

            bytestream_put_buffer(&dst, src, n * sample_size);

        }

        break;

    case AV_CODEC_ID_PCM_ALAW:

        for (; n > 0; n--) {

            v      = *samples++;

            *dst++ = linear_to_alaw[(v + 32768) >> 2];

        }

        break;

    case AV_CODEC_ID_PCM_MULAW:

        for (; n > 0; n--) {

            v      = *samples++;

            *dst++ = linear_to_ulaw[(v + 32768) >> 2];

        }

        break;

    case AV_CODEC_ID_PCM_VIDC:

        for (; n > 0; n--) {

            v      = *samples++;

            *dst++ = linear_to_vidc[(v + 32768) >> 2];

        }

        break;

    default:

        return -1;

    }

    *got_packet_ptr = 1;

    return 0;

}

typedef struct PCMDecode {

    int sample_size;

} PCMDecode;

static av_cold av_unused int pcm_decode_init(AVCodecContext *avctx)

{

    PCMDecode *s = avctx->priv_data;

    static const struct {

        enum AVCodecID codec_id;

        int8_t sample_fmt;

        uint8_t sample_size;

        uint8_t bits_per_sample;

    } codec_id_to_samplefmt[] = {

    #define ENTRY(CODEC_ID, SAMPLE_FMT, BITS_PER_SAMPLE) \

        { AV_CODEC_ID_PCM_ ## CODEC_ID, AV_SAMPLE_FMT_ ## SAMPLE_FMT, \

        BITS_PER_SAMPLE / 8, BITS_PER_SAMPLE }

        ENTRY(S8, U8, 8),        ENTRY(S8_PLANAR, U8P, 8),

        ENTRY(S16BE, S16, 16),   ENTRY(S16BE_PLANAR, S16P, 16),

        ENTRY(S16LE, S16, 16),   ENTRY(S16LE_PLANAR, S16P, 16),

        ENTRY(S24DAUD, S16, 24), ENTRY(S24BE, S32, 24),

        ENTRY(S24LE, S32, 24),   ENTRY(S24LE_PLANAR, S32P, 24),

        ENTRY(S32BE, S32, 32),   ENTRY(S32LE, S32, 32),

        ENTRY(S32LE_PLANAR, S32P, 32),

        ENTRY(S64BE, S64, 64),   ENTRY(S64LE, S64, 64),

        ENTRY(SGA, U8, 8),       ENTRY(U8, U8, 8),

        ENTRY(U16BE, S16, 16),   ENTRY(U16LE, S16, 16),

        ENTRY(U24BE, S32, 24),   ENTRY(U24LE, S32, 24),

        ENTRY(U32BE, S32, 32),   ENTRY(U32LE, S32, 32),

        ENTRY(F32BE, FLT, 32),   ENTRY(F32LE, FLT, 32),

        ENTRY(F64BE, DBL, 64),   ENTRY(F64LE, DBL, 64),

        { .codec_id = AV_CODEC_ID_PCM_LXF, .sample_fmt = AV_SAMPLE_FMT_S32P, .sample_size = 5 },

    };

    for (unsigned i = 0; i < FF_ARRAY_ELEMS(codec_id_to_samplefmt); ++i) {

        if (codec_id_to_samplefmt[i].codec_id == avctx->codec_id) {

            s->sample_size    = codec_id_to_samplefmt[i].sample_size;

            avctx->sample_fmt = codec_id_to_samplefmt[i].sample_fmt;

            if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)

                avctx->bits_per_raw_sample = codec_id_to_samplefmt[i].bits_per_sample;

            break;

        }

        av_assert1(i + 1 < FF_ARRAY_ELEMS(codec_id_to_samplefmt));

    }

    return 0;

}

typedef struct PCMScaleDecode {

    PCMDecode base;

    void (*vector_fmul_scalar)(float *dst, const float *src, float mul,

                               int len);

    float   scale;

} PCMScaleDecode;

static av_cold av_unused int pcm_scale_decode_init(AVCodecContext *avctx)

{

    PCMScaleDecode *s = avctx->priv_data;

    AVFloatDSPContext *fdsp;

    avctx->sample_fmt   = AV_SAMPLE_FMT_FLT;

    s->base.sample_size = 4;

    if (avctx->bits_per_coded_sample < 1 || avctx->bits_per_coded_sample > 24)

        return AVERROR_INVALIDDATA;

    s->scale = 1. / (1 << (avctx->bits_per_coded_sample - 1));

    fdsp = avpriv_float_dsp_alloc(0);

    if (!fdsp)

        return AVERROR(ENOMEM);

    s->vector_fmul_scalar = fdsp->vector_fmul_scalar;

    av_free(fdsp);

    return 0;

}

typedef struct PCMLUTDecode {

    PCMDecode base;

    int16_t   table[256];

} PCMLUTDecode;

static av_cold av_unused int pcm_lut_decode_init(AVCodecContext *avctx)

{

    PCMLUTDecode *s = avctx->priv_data;

    switch (avctx->codec_id) {

    default:

        av_unreachable("pcm_lut_decode_init() only used with alaw, mulaw and vidc");

    case AV_CODEC_ID_PCM_ALAW:

        for (int i = 0; i < 256; i++)

            s->table[i] = alaw2linear(i);

        break;

    case AV_CODEC_ID_PCM_MULAW:

        for (int i = 0; i < 256; i++)

            s->table[i] = ulaw2linear(i);

        break;

    case AV_CODEC_ID_PCM_VIDC:

        for (int i = 0; i < 256; i++)

            s->table[i] = vidc2linear(i);

        break;

    }

    avctx->sample_fmt = AV_SAMPLE_FMT_S16;

    s->base.sample_size = 1;

    return 0;

}

/**

 * 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)                       \

    for (; n > 0; n--) {                                                       \

        uint ## size ## _t v = bytestream_get_ ## endian(&src);                \

        AV_WN ## size ## A(dst, (uint ## size ## _t)(v - offset) << shift);    \

        dst += size / 8;                                                       \

    }

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

    n /= channels;                                                             \

    for (c = 0; c < avctx->ch_layout.nb_channels; c++) {                       \

        int i;                                                                 \

        dst = frame->extended_data[c];                                         \

        for (i = n; i > 0; i--) {                                              \

            uint ## size ## _t v = bytestream_get_ ## endian(&src);            \

            AV_WN ## size ## A(dst, (uint ## size ##_t)(v - offset) << shift); \

            dst += size / 8;                                                   \

        }                                                                      \

    }

static int pcm_decode_frame(AVCodecContext *avctx, AVFrame *frame,

            int *got_frame_ptr, AVPacket *avpkt)

{

    const uint8_t *src = avpkt->data;

    int buf_size       = avpkt->size;

    PCMDecode *s       = avctx->priv_data;

    int channels       = avctx->ch_layout.nb_channels;

    int sample_size    = s->sample_size;

    int c, n, ret, samples_per_block;

    uint8_t *samples;

    int32_t *dst_int32_t;

    samples_per_block = 1;

    if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {

        /* we process 40-bit blocks per channel for LXF */

        samples_per_block = 2;

    }

    if (channels == 0) {

        av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");

        return AVERROR(EINVAL);

    }

    if (avctx->codec_id != avctx->codec->id) {

        av_log(avctx, AV_LOG_ERROR, "codec ids mismatch\n");

        return AVERROR(EINVAL);

    }

    n = channels * sample_size;

    if (n && buf_size % n) {

        if (buf_size < n) {

            av_log(avctx, AV_LOG_ERROR,

                   "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",

                   buf_size, n);

            return AVERROR_INVALIDDATA;

        } else

            buf_size -= buf_size % n;

    }

    n = buf_size / sample_size;

    /* get output buffer */

    frame->nb_samples = n * samples_per_block / channels;

    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)

        return ret;

    samples = frame->data[0];

    switch (avctx->codec_id) {

    case AV_CODEC_ID_PCM_U32LE:

        DECODE(32, le32, src, samples, n, 0, 0x80000000)

        break;

    case AV_CODEC_ID_PCM_U32BE:

        DECODE(32, be32, src, samples, n, 0, 0x80000000)

        break;

    case AV_CODEC_ID_PCM_S24LE:

        DECODE(32, le24, src, samples, n, 8, 0)

        break;

    case AV_CODEC_ID_PCM_S24LE_PLANAR:

        DECODE_PLANAR(32, le24, src, samples, n, 8, 0);

        break;

    case AV_CODEC_ID_PCM_S24BE:

        DECODE(32, be24, src, samples, n, 8, 0)

        break;

    case AV_CODEC_ID_PCM_U24LE:

        DECODE(32, le24, src, samples, n, 8, 0x800000)

        break;

    case AV_CODEC_ID_PCM_U24BE:

        DECODE(32, be24, src, samples, n, 8, 0x800000)

        break;

    case AV_CODEC_ID_PCM_S24DAUD:

        for (; n > 0; n--) {

            uint32_t v = bytestream_get_be24(&src);

            v >>= 4; // sync flags are here

            AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +

                             (ff_reverse[v        & 0xff] << 8));

            samples += 2;

        }

        break;

    case AV_CODEC_ID_PCM_U16LE:

        DECODE(16, le16, src, samples, n, 0, 0x8000)

        break;

    case AV_CODEC_ID_PCM_U16BE:

        DECODE(16, be16, src, samples, n, 0, 0x8000)

        break;

    case AV_CODEC_ID_PCM_S8:

        for (; n > 0; n--)

            *samples++ = *src++ + 128;

        break;

    case AV_CODEC_ID_PCM_SGA:

        for (; n > 0; n--) {

            int sign = *src >> 7;

            int magn = *src & 0x7f;

            *samples++ = sign ? 128 - magn : 128 + magn;

            src++;

        }

        break;

    case AV_CODEC_ID_PCM_S8_PLANAR:

        n /= avctx->ch_layout.nb_channels;

        for (c = 0; c < avctx->ch_layout.nb_channels; c++) {

            int i;

            samples = frame->extended_data[c];

            for (i = n; i > 0; i--)

                *samples++ = *src++ + 128;

        }

        break;

#if HAVE_BIGENDIAN

    case AV_CODEC_ID_PCM_S64LE:

    case AV_CODEC_ID_PCM_F64LE:

        DECODE(64, le64, src, samples, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S32LE:

    case AV_CODEC_ID_PCM_F32LE:

    case AV_CODEC_ID_PCM_F24LE:

    case AV_CODEC_ID_PCM_F16LE:

        DECODE(32, le32, src, samples, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S32LE_PLANAR:

        DECODE_PLANAR(32, le32, src, samples, n, 0, 0);

        break;

    case AV_CODEC_ID_PCM_S16LE:

        DECODE(16, le16, src, samples, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S16LE_PLANAR:

        DECODE_PLANAR(16, le16, src, samples, n, 0, 0);

        break;

    case AV_CODEC_ID_PCM_F64BE:

    case AV_CODEC_ID_PCM_F32BE:

    case AV_CODEC_ID_PCM_S64BE:

    case AV_CODEC_ID_PCM_S32BE:

    case AV_CODEC_ID_PCM_S16BE:

#else

    case AV_CODEC_ID_PCM_S64BE:

    case AV_CODEC_ID_PCM_F64BE:

        DECODE(64, be64, src, samples, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_F32BE:

    case AV_CODEC_ID_PCM_S32BE:

        DECODE(32, be32, src, samples, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S16BE:

        DECODE(16, be16, src, samples, n, 0, 0)

        break;

    case AV_CODEC_ID_PCM_S16BE_PLANAR:

        DECODE_PLANAR(16, be16, src, samples, n, 0, 0);

        break;

    case AV_CODEC_ID_PCM_F64LE:

    case AV_CODEC_ID_PCM_F32LE:

    case AV_CODEC_ID_PCM_F24LE:

    case AV_CODEC_ID_PCM_F16LE:

    case AV_CODEC_ID_PCM_S64LE:

    case AV_CODEC_ID_PCM_S32LE:

    case AV_CODEC_ID_PCM_S16LE:

#endif /* HAVE_BIGENDIAN */

    case AV_CODEC_ID_PCM_U8:

        memcpy(samples, src, n * sample_size);

        break;

#if HAVE_BIGENDIAN

    case AV_CODEC_ID_PCM_S16BE_PLANAR:

#else

    case AV_CODEC_ID_PCM_S16LE_PLANAR:

    case AV_CODEC_ID_PCM_S32LE_PLANAR:

#endif /* HAVE_BIGENDIAN */

        n /= avctx->ch_layout.nb_channels;

        for (c = 0; c < avctx->ch_layout.nb_channels; c++) {

            samples = frame->extended_data[c];

            bytestream_get_buffer(&src, samples, n * sample_size);

        }

        break;

    case AV_CODEC_ID_PCM_ALAW:

    case AV_CODEC_ID_PCM_MULAW:

    case AV_CODEC_ID_PCM_VIDC: {

        const int16_t *const lut = ((PCMLUTDecode*)avctx->priv_data)->table;

        int16_t *restrict samples_16 = (int16_t*)samples;

        for (; n > 0; n--)

            *samples_16++ = lut[*src++];

        break;

    }

    case AV_CODEC_ID_PCM_LXF:

    {

        int i;

        n /= channels;

        for (c = 0; c < channels; c++) {

            dst_int32_t = (int32_t *)frame->extended_data[c];

            for (i = 0; i < n; i++) {

                // extract low 20 bits and expand to 32 bits

                *dst_int32_t++ =  ((uint32_t)src[2]<<28) |

                                  (src[1]         << 20) |

                                  (src[0]         << 12) |

                                 ((src[2] & 0x0F) <<  8) |

                                   src[1];

                // extract high 20 bits and expand to 32 bits

                *dst_int32_t++ =  ((uint32_t)src[4]<<24) |

                                  (src[3]         << 16) |

                                 ((src[2] & 0xF0) <<  8) |

                                  (src[4]         <<  4) |

                                  (src[3]         >>  4);

                src += 5;

            }

        }

        break;

    }

    default:

        return -1;

    }

    if (avctx->codec_id == AV_CODEC_ID_PCM_F16LE ||

        avctx->codec_id == AV_CODEC_ID_PCM_F24LE) {

        PCMScaleDecode *s2 = avctx->priv_data;

        s2->vector_fmul_scalar((float *)frame->extended_data[0],

                               (const float *)frame->extended_data[0],

                               s2->scale, FFALIGN(frame->nb_samples * avctx->ch_layout.nb_channels, 4));

    }

    *got_frame_ptr = 1;

    return buf_size;

}

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

#define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_)                  \

const FFCodec ff_ ## name_ ## _encoder = {                                  \

    .p.name       = #name_,                                                 \

    CODEC_LONG_NAME(long_name_),                                            \

    .p.type       = AVMEDIA_TYPE_AUDIO,                                     \

    .p.id         = id_,                                                    \

    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_VARIABLE_FRAME_SIZE | \

                      AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,                \

    .init         = pcm_encode_init,                                        \

    FF_CODEC_ENCODE_CB(pcm_encode_frame),                                   \

    CODEC_SAMPLEFMTS(sample_fmt_),                                          \

}

#define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)                  \

    PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)

#define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name)                  \

    PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)

#define PCM_ENCODER(id, sample_fmt, name, long_name)                        \

    PCM_ENCODER_3(CONFIG_PCM_ ## id ## _ENCODER, AV_CODEC_ID_PCM_ ## id,    \

                  AV_SAMPLE_FMT_ ## sample_fmt, pcm_ ## name, long_name)

#define PCM_DECODER_0(id, sample_fmt, name, long_name, Context, init_func)

#define PCM_DECODER_1(id_, sample_fmt, name_, long_name, Context, init_func)\

const FFCodec ff_ ## name_ ## _decoder = {                                  \

    .p.name         = #name_,                                               \

    CODEC_LONG_NAME(long_name),                                             \

    .p.type         = AVMEDIA_TYPE_AUDIO,                                   \

    .p.id           = id_,                                                  \

    .priv_data_size = sizeof(Context),                                      \

    .init           = init_func,                                            \

    FF_CODEC_DECODE_CB(pcm_decode_frame),                                    \

    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_PARAM_CHANGE,         \

}

#define PCM_DECODER_2(cf, id, sample_fmt, name, long_name, Context, init_func) \

    PCM_DECODER_ ## cf(id, sample_fmt, name, long_name, Context, init_func)

#define PCM_DECODER_3(cf, id, sample_fmt, name, long_name, Context, init_func) \

    PCM_DECODER_2(cf, id, sample_fmt, name, long_name, Context, init_func)

#define PCM_DEC_EXT(id, sample_fmt, name, long_name, Context, init_func)    \

    PCM_DECODER_3(CONFIG_PCM_ ## id ## _DECODER, AV_CODEC_ID_PCM_ ## id,    \

                  AV_SAMPLE_FMT_ ## sample_fmt, pcm_ ## name, long_name,    \

                  Context, init_func)

#define PCM_DECODER(id, sample_fmt, name, long_name)    \

    PCM_DEC_EXT(id, sample_fmt, name, long_name, PCMDecode, pcm_decode_init)

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

    PCM_ENCODER(id, sample_fmt_, name, long_name_);                     \

    PCM_DECODER(id, sample_fmt_, name, long_name_)

#define PCM_CODEC_EXT(id, sample_fmt, name, long_name, DecContext, dec_init_func) \

    PCM_DEC_EXT(id, sample_fmt, name, long_name, DecContext, dec_init_func);      \

    PCM_ENCODER(id, sample_fmt, name, long_name)

/* Note: Do not forget to add new entries to the Makefile and

 *       to the table in pcm_decode_init() as well. */

//            AV_CODEC_ID_*      pcm_* name

//                          AV_SAMPLE_FMT_*    long name                                DecodeContext   decode init func

PCM_CODEC_EXT(ALAW,         S16, alaw,         "PCM A-law / G.711 A-law",               PCMLUTDecode,   pcm_lut_decode_init);

PCM_DEC_EXT  (F16LE,        FLT, f16le,        "PCM 16.8 floating point little-endian", PCMScaleDecode, pcm_scale_decode_init);

PCM_DEC_EXT  (F24LE,        FLT, f24le,        "PCM 24.0 floating point little-endian", PCMScaleDecode, pcm_scale_decode_init);

PCM_CODEC    (F32BE,        FLT, f32be,        "PCM 32-bit floating point big-endian");

PCM_CODEC    (F32LE,        FLT, f32le,        "PCM 32-bit floating point little-endian");

PCM_CODEC    (F64BE,        DBL, f64be,        "PCM 64-bit floating point big-endian");

PCM_CODEC    (F64LE,        DBL, f64le,        "PCM 64-bit floating point little-endian");

PCM_DECODER  (LXF,          S32P,lxf,          "PCM signed 20-bit little-endian planar");

PCM_CODEC_EXT(MULAW,        S16, mulaw,        "PCM mu-law / G.711 mu-law",             PCMLUTDecode,   pcm_lut_decode_init);

PCM_CODEC    (S8,           U8,  s8,           "PCM signed 8-bit");

PCM_CODEC    (S8_PLANAR,    U8P, s8_planar,    "PCM signed 8-bit planar");

PCM_CODEC    (S16BE,        S16, s16be,        "PCM signed 16-bit big-endian");

PCM_CODEC    (S16BE_PLANAR, S16P,s16be_planar, "PCM signed 16-bit big-endian planar");

PCM_CODEC    (S16LE,        S16, s16le,        "PCM signed 16-bit little-endian");

PCM_CODEC    (S16LE_PLANAR, S16P,s16le_planar, "PCM signed 16-bit little-endian planar");

PCM_CODEC    (S24BE,        S32, s24be,        "PCM signed 24-bit big-endian");

PCM_CODEC    (S24DAUD,      S16, s24daud,      "PCM D-Cinema audio signed 24-bit");

PCM_CODEC    (S24LE,        S32, s24le,        "PCM signed 24-bit little-endian");

PCM_CODEC    (S24LE_PLANAR, S32P,s24le_planar, "PCM signed 24-bit little-endian planar");

PCM_CODEC    (S32BE,        S32, s32be,        "PCM signed 32-bit big-endian");

PCM_CODEC    (S32LE,        S32, s32le,        "PCM signed 32-bit little-endian");

PCM_CODEC    (S32LE_PLANAR, S32P,s32le_planar, "PCM signed 32-bit little-endian planar");

PCM_CODEC    (U8,           U8,  u8,           "PCM unsigned 8-bit");

PCM_CODEC    (U16BE,        S16, u16be,        "PCM unsigned 16-bit big-endian");

PCM_CODEC    (U16LE,        S16, u16le,        "PCM unsigned 16-bit little-endian");

PCM_CODEC    (U24BE,        S32, u24be,        "PCM unsigned 24-bit big-endian");

PCM_CODEC    (U24LE,        S32, u24le,        "PCM unsigned 24-bit little-endian");

PCM_CODEC    (U32BE,        S32, u32be,        "PCM unsigned 32-bit big-endian");

PCM_CODEC    (U32LE,        S32, u32le,        "PCM unsigned 32-bit little-endian");

PCM_CODEC    (S64BE,        S64, s64be,        "PCM signed 64-bit big-endian");

PCM_CODEC    (S64LE,        S64, s64le,        "PCM signed 64-bit little-endian");

PCM_CODEC_EXT(VIDC,         S16, vidc,         "PCM Archimedes VIDC",                   PCMLUTDecode,   pcm_lut_decode_init);

PCM_DECODER  (SGA,          U8,  sga,          "PCM SGA");