mirror of https://git.ffmpeg.org/ffmpeg.git
555 lines
20 KiB
C
555 lines
20 KiB
C
/*
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* PCM codecs
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* Copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* PCM codecs
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*/
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#include "libavutil/attributes.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "mathops.h"
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#include "pcm_tablegen.h"
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#define MAX_CHANNELS 64
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static av_cold int pcm_encode_init(AVCodecContext *avctx)
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{
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avctx->frame_size = 0;
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switch (avctx->codec->id) {
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case AV_CODEC_ID_PCM_ALAW:
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pcm_alaw_tableinit();
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break;
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case AV_CODEC_ID_PCM_MULAW:
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pcm_ulaw_tableinit();
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break;
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default:
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break;
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}
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avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
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avctx->block_align = avctx->channels * avctx->bits_per_coded_sample / 8;
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avctx->bit_rate = avctx->block_align * avctx->sample_rate * 8;
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avctx->coded_frame = avcodec_alloc_frame();
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if (!avctx->coded_frame)
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return AVERROR(ENOMEM);
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return 0;
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}
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static av_cold int pcm_encode_close(AVCodecContext *avctx)
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{
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av_freep(&avctx->coded_frame);
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return 0;
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}
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/**
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* Write PCM samples macro
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* @param type Datatype of native machine format
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* @param endian bytestream_put_xxx() suffix
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* @param src Source pointer (variable name)
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* @param dst Destination pointer (variable name)
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* @param n Total number of samples (variable name)
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* @param shift Bitshift (bits)
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* @param offset Sample value offset
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*/
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#define ENCODE(type, endian, src, dst, n, shift, offset) \
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samples_ ## type = (const type *) src; \
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for (; n > 0; n--) { \
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register type v = (*samples_ ## type++ >> shift) + offset; \
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bytestream_put_ ## endian(&dst, v); \
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}
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static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
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const AVFrame *frame, int *got_packet_ptr)
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{
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int n, sample_size, v, ret;
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const short *samples;
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unsigned char *dst;
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const uint8_t *srcu8;
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const int16_t *samples_int16_t;
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const int32_t *samples_int32_t;
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const int64_t *samples_int64_t;
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const uint16_t *samples_uint16_t;
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const uint32_t *samples_uint32_t;
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sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
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n = frame->nb_samples * avctx->channels;
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samples = (const short *)frame->data[0];
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if ((ret = ff_alloc_packet2(avctx, avpkt, n * sample_size)))
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return ret;
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dst = avpkt->data;
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switch (avctx->codec->id) {
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case AV_CODEC_ID_PCM_U32LE:
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ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
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break;
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case AV_CODEC_ID_PCM_U32BE:
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ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
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break;
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case AV_CODEC_ID_PCM_S24LE:
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ENCODE(int32_t, le24, samples, dst, n, 8, 0)
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break;
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case AV_CODEC_ID_PCM_S24BE:
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ENCODE(int32_t, be24, samples, dst, n, 8, 0)
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break;
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case AV_CODEC_ID_PCM_U24LE:
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ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
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break;
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case AV_CODEC_ID_PCM_U24BE:
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ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
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break;
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case AV_CODEC_ID_PCM_S24DAUD:
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for (; n > 0; n--) {
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uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
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(ff_reverse[*samples & 0xff] << 8);
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tmp <<= 4; // sync flags would go here
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bytestream_put_be24(&dst, tmp);
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samples++;
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}
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break;
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case AV_CODEC_ID_PCM_U16LE:
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ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
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break;
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case AV_CODEC_ID_PCM_U16BE:
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ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
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break;
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case AV_CODEC_ID_PCM_S8:
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srcu8 = frame->data[0];
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for (; n > 0; n--) {
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v = *srcu8++;
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*dst++ = v - 128;
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}
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break;
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#if HAVE_BIGENDIAN
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case AV_CODEC_ID_PCM_F64LE:
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ENCODE(int64_t, le64, samples, dst, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_S32LE:
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case AV_CODEC_ID_PCM_F32LE:
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ENCODE(int32_t, le32, samples, dst, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_S16LE:
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ENCODE(int16_t, le16, samples, dst, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_F64BE:
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case AV_CODEC_ID_PCM_F32BE:
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case AV_CODEC_ID_PCM_S32BE:
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case AV_CODEC_ID_PCM_S16BE:
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#else
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case AV_CODEC_ID_PCM_F64BE:
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ENCODE(int64_t, be64, samples, dst, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_F32BE:
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case AV_CODEC_ID_PCM_S32BE:
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ENCODE(int32_t, be32, samples, dst, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_S16BE:
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ENCODE(int16_t, be16, samples, dst, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_F64LE:
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case AV_CODEC_ID_PCM_F32LE:
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case AV_CODEC_ID_PCM_S32LE:
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case AV_CODEC_ID_PCM_S16LE:
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#endif /* HAVE_BIGENDIAN */
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case AV_CODEC_ID_PCM_U8:
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memcpy(dst, samples, n * sample_size);
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dst += n * sample_size;
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break;
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case AV_CODEC_ID_PCM_ALAW:
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for (; n > 0; n--) {
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v = *samples++;
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*dst++ = linear_to_alaw[(v + 32768) >> 2];
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}
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break;
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case AV_CODEC_ID_PCM_MULAW:
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for (; n > 0; n--) {
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v = *samples++;
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*dst++ = linear_to_ulaw[(v + 32768) >> 2];
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}
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break;
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default:
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return -1;
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}
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*got_packet_ptr = 1;
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return 0;
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}
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typedef struct PCMDecode {
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AVFrame frame;
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short table[256];
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} PCMDecode;
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static av_cold int pcm_decode_init(AVCodecContext *avctx)
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{
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PCMDecode *s = avctx->priv_data;
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int i;
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if (avctx->channels <= 0 || avctx->channels > MAX_CHANNELS) {
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av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
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return AVERROR(EINVAL);
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}
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switch (avctx->codec->id) {
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case AV_CODEC_ID_PCM_ALAW:
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for (i = 0; i < 256; i++)
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s->table[i] = alaw2linear(i);
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break;
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case AV_CODEC_ID_PCM_MULAW:
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for (i = 0; i < 256; i++)
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s->table[i] = ulaw2linear(i);
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break;
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default:
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break;
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}
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avctx->sample_fmt = avctx->codec->sample_fmts[0];
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if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
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avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
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avcodec_get_frame_defaults(&s->frame);
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avctx->coded_frame = &s->frame;
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return 0;
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}
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/**
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* Read PCM samples macro
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* @param size Data size of native machine format
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* @param endian bytestream_get_xxx() endian suffix
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* @param src Source pointer (variable name)
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* @param dst Destination pointer (variable name)
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* @param n Total number of samples (variable name)
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* @param shift Bitshift (bits)
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* @param offset Sample value offset
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*/
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#define DECODE(size, endian, src, dst, n, shift, offset) \
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for (; n > 0; n--) { \
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uint ## size ## _t v = bytestream_get_ ## endian(&src); \
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AV_WN ## size ## A(dst, (v - offset) << shift); \
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dst += size / 8; \
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}
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static int pcm_decode_frame(AVCodecContext *avctx, void *data,
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int *got_frame_ptr, AVPacket *avpkt)
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{
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const uint8_t *src = avpkt->data;
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int buf_size = avpkt->size;
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PCMDecode *s = avctx->priv_data;
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int sample_size, c, n, ret, samples_per_block;
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uint8_t *samples;
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int32_t *dst_int32_t;
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sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
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/* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
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samples_per_block = 1;
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if (AV_CODEC_ID_PCM_DVD == avctx->codec_id) {
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if (avctx->bits_per_coded_sample != 20 &&
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avctx->bits_per_coded_sample != 24) {
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av_log(avctx, AV_LOG_ERROR,
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"PCM DVD unsupported sample depth %i\n",
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avctx->bits_per_coded_sample);
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return AVERROR(EINVAL);
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}
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/* 2 samples are interleaved per block in PCM_DVD */
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samples_per_block = 2;
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sample_size = avctx->bits_per_coded_sample * 2 / 8;
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} else if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
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/* we process 40-bit blocks per channel for LXF */
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samples_per_block = 2;
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sample_size = 5;
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}
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if (sample_size == 0) {
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av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
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return AVERROR(EINVAL);
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}
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n = avctx->channels * sample_size;
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if (n && buf_size % n) {
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if (buf_size < n) {
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av_log(avctx, AV_LOG_ERROR,
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"Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
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buf_size, n);
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return AVERROR_INVALIDDATA;
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} else
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buf_size -= buf_size % n;
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}
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n = buf_size / sample_size;
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/* get output buffer */
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s->frame.nb_samples = n * samples_per_block / avctx->channels;
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if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return ret;
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}
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samples = s->frame.data[0];
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switch (avctx->codec->id) {
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case AV_CODEC_ID_PCM_U32LE:
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DECODE(32, le32, src, samples, n, 0, 0x80000000)
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break;
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case AV_CODEC_ID_PCM_U32BE:
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DECODE(32, be32, src, samples, n, 0, 0x80000000)
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break;
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case AV_CODEC_ID_PCM_S24LE:
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DECODE(32, le24, src, samples, n, 8, 0)
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break;
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case AV_CODEC_ID_PCM_S24BE:
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DECODE(32, be24, src, samples, n, 8, 0)
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break;
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case AV_CODEC_ID_PCM_U24LE:
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DECODE(32, le24, src, samples, n, 8, 0x800000)
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break;
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case AV_CODEC_ID_PCM_U24BE:
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DECODE(32, be24, src, samples, n, 8, 0x800000)
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break;
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case AV_CODEC_ID_PCM_S24DAUD:
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for (; n > 0; n--) {
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uint32_t v = bytestream_get_be24(&src);
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v >>= 4; // sync flags are here
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AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
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(ff_reverse[v & 0xff] << 8));
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samples += 2;
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}
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break;
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case AV_CODEC_ID_PCM_S16LE_PLANAR:
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{
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int i;
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n /= avctx->channels;
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for (c = 0; c < avctx->channels; c++) {
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samples = s->frame.data[c];
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for (i = n; i > 0; i--) {
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AV_WN16A(samples, bytestream_get_le16(&src));
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samples += 2;
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}
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}
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break;
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}
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case AV_CODEC_ID_PCM_U16LE:
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DECODE(16, le16, src, samples, n, 0, 0x8000)
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break;
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case AV_CODEC_ID_PCM_U16BE:
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DECODE(16, be16, src, samples, n, 0, 0x8000)
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break;
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case AV_CODEC_ID_PCM_S8:
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for (; n > 0; n--)
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*samples++ = *src++ + 128;
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break;
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#if HAVE_BIGENDIAN
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case AV_CODEC_ID_PCM_F64LE:
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DECODE(64, le64, src, samples, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_S32LE:
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case AV_CODEC_ID_PCM_F32LE:
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DECODE(32, le32, src, samples, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_S16LE:
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DECODE(16, le16, src, samples, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_F64BE:
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case AV_CODEC_ID_PCM_F32BE:
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case AV_CODEC_ID_PCM_S32BE:
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case AV_CODEC_ID_PCM_S16BE:
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#else
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case AV_CODEC_ID_PCM_F64BE:
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DECODE(64, be64, src, samples, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_F32BE:
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case AV_CODEC_ID_PCM_S32BE:
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DECODE(32, be32, src, samples, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_S16BE:
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DECODE(16, be16, src, samples, n, 0, 0)
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break;
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case AV_CODEC_ID_PCM_F64LE:
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case AV_CODEC_ID_PCM_F32LE:
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case AV_CODEC_ID_PCM_S32LE:
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case AV_CODEC_ID_PCM_S16LE:
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#endif /* HAVE_BIGENDIAN */
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case AV_CODEC_ID_PCM_U8:
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memcpy(samples, src, n * sample_size);
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break;
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case AV_CODEC_ID_PCM_ZORK:
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for (; n > 0; n--) {
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int v = *src++;
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if (v < 128)
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v = 128 - v;
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*samples++ = v;
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}
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break;
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case AV_CODEC_ID_PCM_ALAW:
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case AV_CODEC_ID_PCM_MULAW:
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for (; n > 0; n--) {
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AV_WN16A(samples, s->table[*src++]);
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samples += 2;
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}
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break;
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case AV_CODEC_ID_PCM_DVD:
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{
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const uint8_t *src8;
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dst_int32_t = (int32_t *)s->frame.data[0];
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n /= avctx->channels;
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switch (avctx->bits_per_coded_sample) {
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case 20:
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while (n--) {
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c = avctx->channels;
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src8 = src + 4 * c;
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while (c--) {
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*dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 & 0xf0) << 8);
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*dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ & 0x0f) << 12);
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}
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src = src8;
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}
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break;
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case 24:
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while (n--) {
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c = avctx->channels;
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src8 = src + 4 * c;
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while (c--) {
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*dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
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*dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
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}
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src = src8;
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}
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break;
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}
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break;
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}
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case AV_CODEC_ID_PCM_LXF:
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{
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int i;
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n /= avctx->channels;
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for (c = 0; c < avctx->channels; c++) {
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dst_int32_t = (int32_t *)s->frame.extended_data[c];
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for (i = 0; i < n; i++) {
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// extract low 20 bits and expand to 32 bits
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*dst_int32_t++ = (src[2] << 28) |
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(src[1] << 20) |
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(src[0] << 12) |
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((src[2] & 0x0F) << 8) |
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src[1];
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// extract high 20 bits and expand to 32 bits
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*dst_int32_t++ = (src[4] << 24) |
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(src[3] << 16) |
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((src[2] & 0xF0) << 8) |
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(src[4] << 4) |
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(src[3] >> 4);
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src += 5;
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}
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}
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break;
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}
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default:
|
|
return -1;
|
|
}
|
|
|
|
*got_frame_ptr = 1;
|
|
*(AVFrame *)data = s->frame;
|
|
|
|
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_, \
|
|
.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 }, \
|
|
.long_name = NULL_IF_CONFIG_SMALL(long_name_), \
|
|
}
|
|
|
|
#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_, \
|
|
.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 }, \
|
|
.long_name = NULL_IF_CONFIG_SMALL(long_name_), \
|
|
}
|
|
|
|
#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 / G.711 A-law");
|
|
PCM_DECODER(PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
|
|
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 / G.711 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_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_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");
|
|
|