| /* |
| * 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 "avcodec.h" |
| #include "libavutil/common.h" /* for av_reverse */ |
| #include "bytestream.h" |
| #include "pcm_tablegen.h" |
| |
| #define MAX_CHANNELS 64 |
| |
| static av_cold int pcm_encode_init(AVCodecContext *avctx) |
| { |
| avctx->frame_size = 1; |
| switch(avctx->codec->id) { |
| case CODEC_ID_PCM_ALAW: |
| pcm_alaw_tableinit(); |
| break; |
| case CODEC_ID_PCM_MULAW: |
| pcm_ulaw_tableinit(); |
| break; |
| default: |
| break; |
| } |
| |
| avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id); |
| avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8; |
| avctx->coded_frame= avcodec_alloc_frame(); |
| avctx->coded_frame->key_frame= 1; |
| |
| return 0; |
| } |
| |
| static av_cold int pcm_encode_close(AVCodecContext *avctx) |
| { |
| av_freep(&avctx->coded_frame); |
| |
| 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); \ |
| } |
| |
| static int pcm_encode_frame(AVCodecContext *avctx, |
| unsigned char *frame, int buf_size, void *data) |
| { |
| int n, sample_size, v; |
| const short *samples; |
| unsigned char *dst; |
| const uint8_t *srcu8; |
| 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 = buf_size / sample_size; |
| samples = data; |
| dst = frame; |
| |
| if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) { |
| av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n"); |
| return -1; |
| } |
| |
| switch(avctx->codec->id) { |
| case CODEC_ID_PCM_U32LE: |
| ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000) |
| break; |
| case CODEC_ID_PCM_U32BE: |
| ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000) |
| break; |
| case CODEC_ID_PCM_S24LE: |
| ENCODE(int32_t, le24, samples, dst, n, 8, 0) |
| break; |
| case CODEC_ID_PCM_S24BE: |
| ENCODE(int32_t, be24, samples, dst, n, 8, 0) |
| break; |
| case CODEC_ID_PCM_U24LE: |
| ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000) |
| break; |
| case CODEC_ID_PCM_U24BE: |
| ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000) |
| break; |
| case CODEC_ID_PCM_S24DAUD: |
| for(;n>0;n--) { |
| uint32_t tmp = av_reverse[(*samples >> 8) & 0xff] + |
| (av_reverse[*samples & 0xff] << 8); |
| tmp <<= 4; // sync flags would go here |
| bytestream_put_be24(&dst, tmp); |
| samples++; |
| } |
| break; |
| case CODEC_ID_PCM_U16LE: |
| ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000) |
| break; |
| case CODEC_ID_PCM_U16BE: |
| ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000) |
| break; |
| case CODEC_ID_PCM_S8: |
| srcu8= data; |
| for(;n>0;n--) { |
| v = *srcu8++; |
| *dst++ = v - 128; |
| } |
| break; |
| #if HAVE_BIGENDIAN |
| case CODEC_ID_PCM_F64LE: |
| ENCODE(int64_t, le64, samples, dst, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_S32LE: |
| case CODEC_ID_PCM_F32LE: |
| ENCODE(int32_t, le32, samples, dst, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_S16LE: |
| ENCODE(int16_t, le16, samples, dst, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_F64BE: |
| case CODEC_ID_PCM_F32BE: |
| case CODEC_ID_PCM_S32BE: |
| case CODEC_ID_PCM_S16BE: |
| #else |
| case CODEC_ID_PCM_F64BE: |
| ENCODE(int64_t, be64, samples, dst, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_F32BE: |
| case CODEC_ID_PCM_S32BE: |
| ENCODE(int32_t, be32, samples, dst, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_S16BE: |
| ENCODE(int16_t, be16, samples, dst, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_F64LE: |
| case CODEC_ID_PCM_F32LE: |
| case CODEC_ID_PCM_S32LE: |
| case CODEC_ID_PCM_S16LE: |
| #endif /* HAVE_BIGENDIAN */ |
| case CODEC_ID_PCM_U8: |
| memcpy(dst, samples, n*sample_size); |
| dst += n*sample_size; |
| break; |
| case CODEC_ID_PCM_ZORK: |
| for(;n>0;n--) { |
| v= *samples++ >> 8; |
| if(v<0) v = -v; |
| else v+= 128; |
| *dst++ = v; |
| } |
| break; |
| case CODEC_ID_PCM_ALAW: |
| for(;n>0;n--) { |
| v = *samples++; |
| *dst++ = linear_to_alaw[(v + 32768) >> 2]; |
| } |
| break; |
| case CODEC_ID_PCM_MULAW: |
| for(;n>0;n--) { |
| v = *samples++; |
| *dst++ = linear_to_ulaw[(v + 32768) >> 2]; |
| } |
| break; |
| default: |
| return -1; |
| } |
| //avctx->frame_size = (dst - frame) / (sample_size * avctx->channels); |
| |
| return dst - frame; |
| } |
| |
| typedef struct PCMDecode { |
| short table[256]; |
| } PCMDecode; |
| |
| static av_cold int pcm_decode_init(AVCodecContext * avctx) |
| { |
| PCMDecode *s = avctx->priv_data; |
| int i; |
| |
| switch(avctx->codec->id) { |
| case CODEC_ID_PCM_ALAW: |
| for(i=0;i<256;i++) |
| s->table[i] = alaw2linear(i); |
| break; |
| case CODEC_ID_PCM_MULAW: |
| for(i=0;i<256;i++) |
| s->table[i] = ulaw2linear(i); |
| break; |
| default: |
| break; |
| } |
| |
| avctx->sample_fmt = avctx->codec->sample_fmts[0]; |
| |
| if (avctx->sample_fmt == AV_SAMPLE_FMT_S32) |
| avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id); |
| |
| return 0; |
| } |
| |
| /** |
| * Read PCM samples macro |
| * @param type Datatype 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(type, endian, src, dst, n, shift, offset) \ |
| dst_##type = (type*)dst; \ |
| for(;n>0;n--) { \ |
| register type v = bytestream_get_##endian(&src); \ |
| *dst_##type++ = (v - offset) << shift; \ |
| } \ |
| dst = (short*)dst_##type; |
| |
| static int pcm_decode_frame(AVCodecContext *avctx, |
| void *data, int *data_size, |
| AVPacket *avpkt) |
| { |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| PCMDecode *s = avctx->priv_data; |
| int sample_size, c, n, i; |
| short *samples; |
| const uint8_t *src, *src8, *src2[MAX_CHANNELS]; |
| uint8_t *dstu8; |
| int16_t *dst_int16_t; |
| int32_t *dst_int32_t; |
| int64_t *dst_int64_t; |
| uint16_t *dst_uint16_t; |
| uint32_t *dst_uint32_t; |
| |
| samples = data; |
| src = buf; |
| |
| if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) { |
| av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n"); |
| return -1; |
| } |
| |
| if(avctx->channels <= 0 || avctx->channels > MAX_CHANNELS){ |
| av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n"); |
| return -1; |
| } |
| |
| sample_size = av_get_bits_per_sample(avctx->codec_id)/8; |
| |
| /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */ |
| if (CODEC_ID_PCM_DVD == avctx->codec_id) |
| /* 2 samples are interleaved per block in PCM_DVD */ |
| sample_size = avctx->bits_per_coded_sample * 2 / 8; |
| else if (avctx->codec_id == CODEC_ID_PCM_LXF) |
| /* we process 40-bit blocks per channel for LXF */ |
| sample_size = 5; |
| |
| if (sample_size == 0) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| n = avctx->channels * sample_size; |
| |
| if(n && buf_size % n){ |
| if (buf_size < n) { |
| av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n"); |
| return -1; |
| }else |
| buf_size -= buf_size % n; |
| } |
| |
| buf_size= FFMIN(buf_size, *data_size/2); |
| *data_size=0; |
| |
| n = buf_size/sample_size; |
| |
| switch(avctx->codec->id) { |
| case CODEC_ID_PCM_U32LE: |
| DECODE(uint32_t, le32, src, samples, n, 0, 0x80000000) |
| break; |
| case CODEC_ID_PCM_U32BE: |
| DECODE(uint32_t, be32, src, samples, n, 0, 0x80000000) |
| break; |
| case CODEC_ID_PCM_S24LE: |
| DECODE(int32_t, le24, src, samples, n, 8, 0) |
| break; |
| case CODEC_ID_PCM_S24BE: |
| DECODE(int32_t, be24, src, samples, n, 8, 0) |
| break; |
| case CODEC_ID_PCM_U24LE: |
| DECODE(uint32_t, le24, src, samples, n, 8, 0x800000) |
| break; |
| case CODEC_ID_PCM_U24BE: |
| DECODE(uint32_t, be24, src, samples, n, 8, 0x800000) |
| break; |
| case CODEC_ID_PCM_S24DAUD: |
| for(;n>0;n--) { |
| uint32_t v = bytestream_get_be24(&src); |
| v >>= 4; // sync flags are here |
| *samples++ = av_reverse[(v >> 8) & 0xff] + |
| (av_reverse[v & 0xff] << 8); |
| } |
| break; |
| case CODEC_ID_PCM_S16LE_PLANAR: |
| n /= avctx->channels; |
| for(c=0;c<avctx->channels;c++) |
| src2[c] = &src[c*n*2]; |
| for(;n>0;n--) |
| for(c=0;c<avctx->channels;c++) |
| *samples++ = bytestream_get_le16(&src2[c]); |
| src = src2[avctx->channels-1]; |
| break; |
| case CODEC_ID_PCM_U16LE: |
| DECODE(uint16_t, le16, src, samples, n, 0, 0x8000) |
| break; |
| case CODEC_ID_PCM_U16BE: |
| DECODE(uint16_t, be16, src, samples, n, 0, 0x8000) |
| break; |
| case CODEC_ID_PCM_S8: |
| dstu8= (uint8_t*)samples; |
| for(;n>0;n--) { |
| *dstu8++ = *src++ + 128; |
| } |
| samples= (short*)dstu8; |
| break; |
| #if HAVE_BIGENDIAN |
| case CODEC_ID_PCM_F64LE: |
| DECODE(int64_t, le64, src, samples, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_S32LE: |
| case CODEC_ID_PCM_F32LE: |
| DECODE(int32_t, le32, src, samples, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_S16LE: |
| DECODE(int16_t, le16, src, samples, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_F64BE: |
| case CODEC_ID_PCM_F32BE: |
| case CODEC_ID_PCM_S32BE: |
| case CODEC_ID_PCM_S16BE: |
| #else |
| case CODEC_ID_PCM_F64BE: |
| DECODE(int64_t, be64, src, samples, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_F32BE: |
| case CODEC_ID_PCM_S32BE: |
| DECODE(int32_t, be32, src, samples, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_S16BE: |
| DECODE(int16_t, be16, src, samples, n, 0, 0) |
| break; |
| case CODEC_ID_PCM_F64LE: |
| case CODEC_ID_PCM_F32LE: |
| case CODEC_ID_PCM_S32LE: |
| case CODEC_ID_PCM_S16LE: |
| #endif /* HAVE_BIGENDIAN */ |
| case CODEC_ID_PCM_U8: |
| memcpy(samples, src, n*sample_size); |
| src += n*sample_size; |
| samples = (short*)((uint8_t*)data + n*sample_size); |
| break; |
| case CODEC_ID_PCM_ZORK: |
| for(;n>0;n--) { |
| int x= *src++; |
| if(x&128) x-= 128; |
| else x = -x; |
| *samples++ = x << 8; |
| } |
| break; |
| case CODEC_ID_PCM_ALAW: |
| case CODEC_ID_PCM_MULAW: |
| for(;n>0;n--) { |
| *samples++ = s->table[*src++]; |
| } |
| break; |
| case CODEC_ID_PCM_DVD: |
| dst_int32_t = data; |
| n /= avctx->channels; |
| switch (avctx->bits_per_coded_sample) { |
| case 20: |
| while (n--) { |
| c = avctx->channels; |
| src8 = src + 4*c; |
| while (c--) { |
| *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 &0xf0) << 8); |
| *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12); |
| } |
| src = src8; |
| } |
| break; |
| case 24: |
| while (n--) { |
| c = avctx->channels; |
| src8 = src + 4*c; |
| while (c--) { |
| *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8); |
| *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8); |
| } |
| src = src8; |
| } |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n"); |
| return -1; |
| break; |
| } |
| samples = (short *) dst_int32_t; |
| break; |
| case CODEC_ID_PCM_LXF: |
| dst_int32_t = data; |
| n /= avctx->channels; |
| //unpack and de-planerize |
| for (i = 0; i < n; i++) { |
| for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) { |
| //extract low 20 bits and expand to 32 bits |
| *dst_int32_t++ = (src8[2] << 28) | (src8[1] << 20) | (src8[0] << 12) | |
| ((src8[2] & 0xF) << 8) | src8[1]; |
| } |
| |
| for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) { |
| //extract high 20 bits and expand to 32 bits |
| *dst_int32_t++ = (src8[4] << 24) | (src8[3] << 16) | |
| ((src8[2] & 0xF0) << 8) | (src8[4] << 4) | (src8[3] >> 4); |
| } |
| } |
| src += n * avctx->channels * 5; |
| samples = (short *) dst_int32_t; |
| break; |
| default: |
| return -1; |
| } |
| *data_size = (uint8_t *)samples - (uint8_t *)data; |
| return src - buf; |
| } |
| |
| #if CONFIG_ENCODERS |
| #define PCM_ENCODER(id_,sample_fmt_,name_,long_name_) \ |
| AVCodec ff_ ## name_ ## _encoder = { \ |
| .name = #name_, \ |
| .type = AVMEDIA_TYPE_AUDIO, \ |
| .id = id_, \ |
| .init = pcm_encode_init, \ |
| .encode = pcm_encode_frame, \ |
| .close = pcm_encode_close, \ |
| .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \ |
| .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ |
| } |
| #else |
| #define PCM_ENCODER(id,sample_fmt_,name,long_name_) |
| #endif |
| |
| #if CONFIG_DECODERS |
| #define PCM_DECODER(id_,sample_fmt_,name_,long_name_) \ |
| AVCodec ff_ ## name_ ## _decoder = { \ |
| .name = #name_, \ |
| .type = AVMEDIA_TYPE_AUDIO, \ |
| .id = id_, \ |
| .priv_data_size = sizeof(PCMDecode), \ |
| .init = pcm_decode_init, \ |
| .decode = pcm_decode_frame, \ |
| .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \ |
| .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ |
| } |
| #else |
| #define PCM_DECODER(id,sample_fmt_,name,long_name_) |
| #endif |
| |
| #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_) |
| |
| /* Note: Do not forget to add new entries to the Makefile as well. */ |
| PCM_CODEC (CODEC_ID_PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law"); |
| PCM_DECODER(CODEC_ID_PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian"); |
| PCM_CODEC (CODEC_ID_PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian"); |
| PCM_DECODER(CODEC_ID_PCM_LXF, AV_SAMPLE_FMT_S32, pcm_lxf, "PCM signed 20-bit little-endian planar"); |
| PCM_CODEC (CODEC_ID_PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law"); |
| PCM_CODEC (CODEC_ID_PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit"); |
| PCM_CODEC (CODEC_ID_PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian"); |
| PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar"); |
| PCM_CODEC (CODEC_ID_PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit"); |
| PCM_CODEC (CODEC_ID_PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian"); |
| PCM_CODEC (CODEC_ID_PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian"); |
| PCM_CODEC (CODEC_ID_PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit"); |
| PCM_CODEC (CODEC_ID_PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian"); |
| PCM_CODEC (CODEC_ID_PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian"); |
| PCM_CODEC (CODEC_ID_PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian"); |
| PCM_CODEC (CODEC_ID_PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian"); |
| PCM_CODEC (CODEC_ID_PCM_ZORK, AV_SAMPLE_FMT_S16, pcm_zork, "PCM Zork"); |
