/* * PCM codecs * Copyright (c) 2001 Fabrice Bellard * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * PCM codecs */ #include "libavutil/attributes.h" #include "avcodec.h" #include "bytestream.h" #include "internal.h" #include "mathops.h" #include "pcm_tablegen.h" static av_cold int pcm_encode_init(AVCodecContext *avctx) { avctx->frame_size = 0; switch (avctx->codec->id) { case AV_CODEC_ID_PCM_ALAW: pcm_alaw_tableinit(); break; case AV_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->bit_rate = avctx->block_align * avctx->sample_rate * 8; avctx->coded_frame = av_frame_alloc(); if (!avctx->coded_frame) return AVERROR(ENOMEM); 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, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) { int n, sample_size, v, ret; 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 = frame->nb_samples * avctx->channels; samples = (const short *)frame->data[0]; if ((ret = ff_alloc_packet(avpkt, n * sample_size))) { av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n"); 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_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: srcu8 = frame->data[0]; for (; n > 0; n--) { v = *srcu8++; *dst++ = v - 128; } break; #if HAVE_BIGENDIAN 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_S16LE: ENCODE(int16_t, le16, samples, dst, n, 0, 0) break; case AV_CODEC_ID_PCM_F64BE: case AV_CODEC_ID_PCM_F32BE: case AV_CODEC_ID_PCM_S32BE: case AV_CODEC_ID_PCM_S16BE: #else 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_F64LE: case AV_CODEC_ID_PCM_F32LE: 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); dst += 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; default: return -1; } *got_packet_ptr = 1; return 0; } typedef struct PCMDecode { short table[256]; } PCMDecode; static av_cold int pcm_decode_init(AVCodecContext *avctx) { PCMDecode *s = avctx->priv_data; int i; if (avctx->channels <= 0) { av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n"); return AVERROR(EINVAL); } switch (avctx->codec->id) { case AV_CODEC_ID_PCM_ALAW: for (i = 0; i < 256; i++) s->table[i] = alaw2linear(i); break; case AV_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 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, (v - offset) << shift); \ dst += size / 8; \ } #if HAVE_BIGENDIAN #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \ { \ int av_unused n2; \ n /= avctx->channels; \ for (c = 0; c < avctx->channels; c++) { \ samples = frame->extended_data[c]; \ n2 = n; \ DECODE(size, endian, src, samples, n2, 0, 0) \ } \ } #else #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \ { \ n /= avctx->channels; \ for (c = 0; c < avctx->channels; c++) { \ samples = frame->extended_data[c]; \ memcpy(samples, src, n * size / 8); \ src += n * size / 8; \ } \ } #endif /* HAVE_BIGENDIAN */ static int pcm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt) { const uint8_t *src = avpkt->data; int buf_size = avpkt->size; PCMDecode *s = avctx->priv_data; AVFrame *frame = data; int sample_size, c, n, ret, samples_per_block; uint8_t *samples; int32_t *dst_int32_t; sample_size = av_get_bits_per_sample(avctx->codec_id) / 8; /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */ 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; 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; } n = buf_size / sample_size; /* get output buffer */ frame->nb_samples = n * samples_per_block / avctx->channels; if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 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_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_S16LE_PLANAR: DECODE_PLANAR(16, le16, src, samples, n, 0, 0); break; case AV_CODEC_ID_PCM_S24LE_PLANAR: DECODE_PLANAR(32, le24, src, samples, n, 8, 0); break; case AV_CODEC_ID_PCM_S32LE_PLANAR: DECODE_PLANAR(32, le32, src, samples, n, 0, 0); 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; #if HAVE_BIGENDIAN 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: DECODE(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_F64BE: case AV_CODEC_ID_PCM_F32BE: case AV_CODEC_ID_PCM_S32BE: case AV_CODEC_ID_PCM_S16BE: #else 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_F64LE: case AV_CODEC_ID_PCM_F32LE: 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; case AV_CODEC_ID_PCM_ZORK: for (; n > 0; n--) { int v = *src++; if (v < 128) v = 128 - v; *samples++ = v; } break; case AV_CODEC_ID_PCM_ALAW: case AV_CODEC_ID_PCM_MULAW: for (; n > 0; n--) { AV_WN16A(samples, s->table[*src++]); samples += 2; } break; case AV_CODEC_ID_PCM_LXF: { int i; n /= avctx->channels; for (c = 0; c < avctx->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++ = (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++ = (src[4] << 24) | (src[3] << 16) | ((src[2] & 0xF0) << 8) | (src[4] << 4) | (src[3] >> 4); src += 5; } } break; } default: return -1; } *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_) \ AVCodec ff_ ## name_ ## _encoder = { \ .name = #name_, \ .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ .type = AVMEDIA_TYPE_AUDIO, \ .id = AV_CODEC_ID_ ## id_, \ .init = pcm_encode_init, \ .encode2 = pcm_encode_frame, \ .close = pcm_encode_close, \ .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \ .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \ AV_SAMPLE_FMT_NONE }, \ } #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_ ## id ## _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_) \ AVCodec ff_ ## name_ ## _decoder = { \ .name = #name_, \ .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ .type = AVMEDIA_TYPE_AUDIO, \ .id = AV_CODEC_ID_ ## id_, \ .priv_data_size = sizeof(PCMDecode), \ .init = pcm_decode_init, \ .decode = pcm_decode_frame, \ .capabilities = CODEC_CAP_DR1, \ .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \ AV_SAMPLE_FMT_NONE }, \ } #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \ PCM_DECODER_ ## cf(id, sample_fmt, name, long_name) #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \ PCM_DECODER_2(cf, id, sample_fmt, name, long_name) #define PCM_DECODER(id, sample_fmt, name, long_name) \ PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name) #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 (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law"); PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian"); PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian"); PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian"); PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian"); 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"); PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit"); PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian"); PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian"); PCM_DECODER(PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P, pcm_s16le_planar, "PCM 16-bit little-endian planar"); PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian"); PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit"); PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian"); PCM_DECODER(PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar"); PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian"); PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian"); PCM_DECODER(PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar"); PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit"); PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian"); PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian"); PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian"); PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian"); PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian"); PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian"); PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");