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-rw-r--r--contrib/ffmpeg/libavcodec/pcm.c555
1 files changed, 0 insertions, 555 deletions
diff --git a/contrib/ffmpeg/libavcodec/pcm.c b/contrib/ffmpeg/libavcodec/pcm.c
deleted file mode 100644
index 926c6f010..000000000
--- a/contrib/ffmpeg/libavcodec/pcm.c
+++ /dev/null
@@ -1,555 +0,0 @@
-/*
- * 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.c
- * PCM codecs
- */
-
-#include "avcodec.h"
-#include "bitstream.h" // for ff_reverse
-#include "bytestream.h"
-
-#define MAX_CHANNELS 64
-
-/* from g711.c by SUN microsystems (unrestricted use) */
-
-#define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */
-#define QUANT_MASK (0xf) /* Quantization field mask. */
-#define NSEGS (8) /* Number of A-law segments. */
-#define SEG_SHIFT (4) /* Left shift for segment number. */
-#define SEG_MASK (0x70) /* Segment field mask. */
-
-#define BIAS (0x84) /* Bias for linear code. */
-
-/*
- * alaw2linear() - Convert an A-law value to 16-bit linear PCM
- *
- */
-static int alaw2linear(unsigned char a_val)
-{
- int t;
- int seg;
-
- a_val ^= 0x55;
-
- t = a_val & QUANT_MASK;
- seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
- if(seg) t= (t + t + 1 + 32) << (seg + 2);
- else t= (t + t + 1 ) << 3;
-
- return ((a_val & SIGN_BIT) ? t : -t);
-}
-
-static int ulaw2linear(unsigned char u_val)
-{
- int t;
-
- /* Complement to obtain normal u-law value. */
- u_val = ~u_val;
-
- /*
- * Extract and bias the quantization bits. Then
- * shift up by the segment number and subtract out the bias.
- */
- t = ((u_val & QUANT_MASK) << 3) + BIAS;
- t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
-
- return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
-}
-
-/* 16384 entries per table */
-static uint8_t linear_to_alaw[16384];
-static uint8_t linear_to_ulaw[16384];
-
-static void build_xlaw_table(uint8_t *linear_to_xlaw,
- int (*xlaw2linear)(unsigned char),
- int mask)
-{
- int i, j, v, v1, v2;
-
- j = 0;
- for(i=0;i<128;i++) {
- if (i != 127) {
- v1 = xlaw2linear(i ^ mask);
- v2 = xlaw2linear((i + 1) ^ mask);
- v = (v1 + v2 + 4) >> 3;
- } else {
- v = 8192;
- }
- for(;j<v;j++) {
- linear_to_xlaw[8192 + j] = (i ^ mask);
- if (j > 0)
- linear_to_xlaw[8192 - j] = (i ^ (mask ^ 0x80));
- }
- }
- linear_to_xlaw[0] = linear_to_xlaw[1];
-}
-
-static int pcm_encode_init(AVCodecContext *avctx)
-{
- avctx->frame_size = 1;
- switch(avctx->codec->id) {
- case CODEC_ID_PCM_ALAW:
- build_xlaw_table(linear_to_alaw, alaw2linear, 0xd5);
- break;
- case CODEC_ID_PCM_MULAW:
- build_xlaw_table(linear_to_ulaw, ulaw2linear, 0xff);
- break;
- default:
- break;
- }
-
- switch(avctx->codec->id) {
- case CODEC_ID_PCM_S32LE:
- case CODEC_ID_PCM_S32BE:
- case CODEC_ID_PCM_U32LE:
- case CODEC_ID_PCM_U32BE:
- avctx->block_align = 4 * avctx->channels;
- break;
- case CODEC_ID_PCM_S24LE:
- case CODEC_ID_PCM_S24BE:
- case CODEC_ID_PCM_U24LE:
- case CODEC_ID_PCM_U24BE:
- case CODEC_ID_PCM_S24DAUD:
- avctx->block_align = 3 * avctx->channels;
- break;
- case CODEC_ID_PCM_S16LE:
- case CODEC_ID_PCM_S16BE:
- case CODEC_ID_PCM_U16LE:
- case CODEC_ID_PCM_U16BE:
- avctx->block_align = 2 * avctx->channels;
- break;
- case CODEC_ID_PCM_S8:
- case CODEC_ID_PCM_U8:
- case CODEC_ID_PCM_MULAW:
- case CODEC_ID_PCM_ALAW:
- avctx->block_align = avctx->channels;
- break;
- default:
- break;
- }
-
- avctx->coded_frame= avcodec_alloc_frame();
- avctx->coded_frame->key_frame= 1;
-
- return 0;
-}
-
-static int pcm_encode_close(AVCodecContext *avctx)
-{
- av_freep(&avctx->coded_frame);
-
- return 0;
-}
-
-/**
- * \brief convert samples from 16 bit
- * \param bps byte per sample for the destination format, must be >= 2
- * \param le 0 for big-, 1 for little-endian
- * \param us 0 for signed, 1 for unsigned output
- * \param samples input samples
- * \param dst output samples
- * \param n number of samples in samples buffer.
- */
-static inline void encode_from16(int bps, int le, int us,
- short **samples, uint8_t **dst, int n) {
- int usum = us ? 0x8000 : 0;
- if (bps > 2)
- memset(*dst, 0, n * bps);
- if (le) *dst += bps - 2;
- for(;n>0;n--) {
- register int v = *(*samples)++;
- v += usum;
- if (le) AV_WL16(*dst, v);
- else AV_WB16(*dst, v);
- *dst += bps;
- }
- if (le) *dst -= bps - 2;
-}
-
-static int pcm_encode_frame(AVCodecContext *avctx,
- unsigned char *frame, int buf_size, void *data)
-{
- int n, sample_size, v;
- short *samples;
- unsigned char *dst;
-
- switch(avctx->codec->id) {
- case CODEC_ID_PCM_S32LE:
- case CODEC_ID_PCM_S32BE:
- case CODEC_ID_PCM_U32LE:
- case CODEC_ID_PCM_U32BE:
- sample_size = 4;
- break;
- case CODEC_ID_PCM_S24LE:
- case CODEC_ID_PCM_S24BE:
- case CODEC_ID_PCM_U24LE:
- case CODEC_ID_PCM_U24BE:
- case CODEC_ID_PCM_S24DAUD:
- sample_size = 3;
- break;
- case CODEC_ID_PCM_S16LE:
- case CODEC_ID_PCM_S16BE:
- case CODEC_ID_PCM_U16LE:
- case CODEC_ID_PCM_U16BE:
- sample_size = 2;
- break;
- default:
- sample_size = 1;
- break;
- }
- n = buf_size / sample_size;
- samples = data;
- dst = frame;
-
- switch(avctx->codec->id) {
- case CODEC_ID_PCM_S32LE:
- encode_from16(4, 1, 0, &samples, &dst, n);
- break;
- case CODEC_ID_PCM_S32BE:
- encode_from16(4, 0, 0, &samples, &dst, n);
- break;
- case CODEC_ID_PCM_U32LE:
- encode_from16(4, 1, 1, &samples, &dst, n);
- break;
- case CODEC_ID_PCM_U32BE:
- encode_from16(4, 0, 1, &samples, &dst, n);
- break;
- case CODEC_ID_PCM_S24LE:
- encode_from16(3, 1, 0, &samples, &dst, n);
- break;
- case CODEC_ID_PCM_S24BE:
- encode_from16(3, 0, 0, &samples, &dst, n);
- break;
- case CODEC_ID_PCM_U24LE:
- encode_from16(3, 1, 1, &samples, &dst, n);
- break;
- case CODEC_ID_PCM_U24BE:
- encode_from16(3, 0, 1, &samples, &dst, n);
- break;
- case CODEC_ID_PCM_S24DAUD:
- for(;n>0;n--) {
- uint32_t tmp = ff_reverse[*samples >> 8] +
- (ff_reverse[*samples & 0xff] << 8);
- tmp <<= 4; // sync flags would go here
- bytestream_put_be24(&dst, tmp);
- samples++;
- }
- break;
- case CODEC_ID_PCM_S16LE:
- for(;n>0;n--) {
- v = *samples++;
- bytestream_put_le16(&dst, v);
- }
- break;
- case CODEC_ID_PCM_S16BE:
- for(;n>0;n--) {
- v = *samples++;
- bytestream_put_be16(&dst, v);
- }
- break;
- case CODEC_ID_PCM_U16LE:
- for(;n>0;n--) {
- v = *samples++;
- v += 0x8000;
- bytestream_put_le16(&dst, v);
- }
- break;
- case CODEC_ID_PCM_U16BE:
- for(;n>0;n--) {
- v = *samples++;
- v += 0x8000;
- bytestream_put_be16(&dst, v);
- }
- break;
- case CODEC_ID_PCM_S8:
- for(;n>0;n--) {
- v = *samples++;
- *dst++ = v >> 8;
- }
- break;
- case CODEC_ID_PCM_U8:
- for(;n>0;n--) {
- v = *samples++;
- *dst++ = (v >> 8) + 128;
- }
- 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 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;
- }
- return 0;
-}
-
-/**
- * \brief convert samples to 16 bit
- * \param bps byte per sample for the source format, must be >= 2
- * \param le 0 for big-, 1 for little-endian
- * \param us 0 for signed, 1 for unsigned input
- * \param src input samples
- * \param samples output samples
- * \param src_len number of bytes in src
- */
-static inline void decode_to16(int bps, int le, int us,
- const uint8_t **src, short **samples, int src_len)
-{
- int usum = us ? -0x8000 : 0;
- register int n = src_len / bps;
- if (le) *src += bps - 2;
- for(;n>0;n--) {
- register int v;
- if (le) v = AV_RL16(*src);
- else v = AV_RB16(*src);
- v += usum;
- *(*samples)++ = v;
- *src += bps;
- }
- if (le) *src -= bps - 2;
-}
-
-static int pcm_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- const uint8_t *buf, int buf_size)
-{
- PCMDecode *s = avctx->priv_data;
- int c, n;
- short *samples;
- const uint8_t *src, *src2[MAX_CHANNELS];
-
- samples = data;
- src = buf;
-
- n= av_get_bits_per_sample(avctx->codec_id)/8;
- if(n && buf_size % n){
- av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\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;
- }
-
- buf_size= FFMIN(buf_size, *data_size/2);
- *data_size=0;
-
- n = buf_size/avctx->channels;
- for(c=0;c<avctx->channels;c++)
- src2[c] = &src[c*n];
-
- switch(avctx->codec->id) {
- case CODEC_ID_PCM_S32LE:
- decode_to16(4, 1, 0, &src, &samples, buf_size);
- break;
- case CODEC_ID_PCM_S32BE:
- decode_to16(4, 0, 0, &src, &samples, buf_size);
- break;
- case CODEC_ID_PCM_U32LE:
- decode_to16(4, 1, 1, &src, &samples, buf_size);
- break;
- case CODEC_ID_PCM_U32BE:
- decode_to16(4, 0, 1, &src, &samples, buf_size);
- break;
- case CODEC_ID_PCM_S24LE:
- decode_to16(3, 1, 0, &src, &samples, buf_size);
- break;
- case CODEC_ID_PCM_S24BE:
- decode_to16(3, 0, 0, &src, &samples, buf_size);
- break;
- case CODEC_ID_PCM_U24LE:
- decode_to16(3, 1, 1, &src, &samples, buf_size);
- break;
- case CODEC_ID_PCM_U24BE:
- decode_to16(3, 0, 1, &src, &samples, buf_size);
- break;
- case CODEC_ID_PCM_S24DAUD:
- n = buf_size / 3;
- for(;n>0;n--) {
- uint32_t v = bytestream_get_be24(&src);
- v >>= 4; // sync flags are here
- *samples++ = ff_reverse[(v >> 8) & 0xff] +
- (ff_reverse[v & 0xff] << 8);
- }
- break;
- case CODEC_ID_PCM_S16LE:
- n = buf_size >> 1;
- for(;n>0;n--) {
- *samples++ = bytestream_get_le16(&src);
- }
- break;
- case CODEC_ID_PCM_S16LE_PLANAR:
- for(n>>=1;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_S16BE:
- n = buf_size >> 1;
- for(;n>0;n--) {
- *samples++ = bytestream_get_be16(&src);
- }
- break;
- case CODEC_ID_PCM_U16LE:
- n = buf_size >> 1;
- for(;n>0;n--) {
- *samples++ = bytestream_get_le16(&src) - 0x8000;
- }
- break;
- case CODEC_ID_PCM_U16BE:
- n = buf_size >> 1;
- for(;n>0;n--) {
- *samples++ = bytestream_get_be16(&src) - 0x8000;
- }
- break;
- case CODEC_ID_PCM_S8:
- n = buf_size;
- for(;n>0;n--) {
- *samples++ = *src++ << 8;
- }
- break;
- case CODEC_ID_PCM_U8:
- n = buf_size;
- for(;n>0;n--) {
- *samples++ = ((int)*src++ - 128) << 8;
- }
- break;
- case CODEC_ID_PCM_ZORK:
- n = buf_size;
- 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:
- n = buf_size;
- for(;n>0;n--) {
- *samples++ = s->table[*src++];
- }
- break;
- default:
- return -1;
- }
- *data_size = (uint8_t *)samples - (uint8_t *)data;
- return src - buf;
-}
-
-#ifdef CONFIG_ENCODERS
-#define PCM_ENCODER(id,name) \
-AVCodec name ## _encoder = { \
- #name, \
- CODEC_TYPE_AUDIO, \
- id, \
- 0, \
- pcm_encode_init, \
- pcm_encode_frame, \
- pcm_encode_close, \
- NULL, \
-};
-#else
-#define PCM_ENCODER(id,name)
-#endif
-
-#ifdef CONFIG_DECODERS
-#define PCM_DECODER(id,name) \
-AVCodec name ## _decoder = { \
- #name, \
- CODEC_TYPE_AUDIO, \
- id, \
- sizeof(PCMDecode), \
- pcm_decode_init, \
- NULL, \
- NULL, \
- pcm_decode_frame, \
-};
-#else
-#define PCM_DECODER(id,name)
-#endif
-
-#define PCM_CODEC(id, name) \
-PCM_ENCODER(id,name) PCM_DECODER(id,name)
-
-PCM_CODEC (CODEC_ID_PCM_S32LE, pcm_s32le);
-PCM_CODEC (CODEC_ID_PCM_S32BE, pcm_s32be);
-PCM_CODEC (CODEC_ID_PCM_U32LE, pcm_u32le);
-PCM_CODEC (CODEC_ID_PCM_U32BE, pcm_u32be);
-PCM_CODEC (CODEC_ID_PCM_S24LE, pcm_s24le);
-PCM_CODEC (CODEC_ID_PCM_S24BE, pcm_s24be);
-PCM_CODEC (CODEC_ID_PCM_U24LE, pcm_u24le);
-PCM_CODEC (CODEC_ID_PCM_U24BE, pcm_u24be);
-PCM_CODEC (CODEC_ID_PCM_S24DAUD, pcm_s24daud);
-PCM_CODEC (CODEC_ID_PCM_S16LE, pcm_s16le);
-PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, pcm_s16le_planar);
-PCM_CODEC (CODEC_ID_PCM_S16BE, pcm_s16be);
-PCM_CODEC (CODEC_ID_PCM_U16LE, pcm_u16le);
-PCM_CODEC (CODEC_ID_PCM_U16BE, pcm_u16be);
-PCM_CODEC (CODEC_ID_PCM_S8, pcm_s8);
-PCM_CODEC (CODEC_ID_PCM_U8, pcm_u8);
-PCM_CODEC (CODEC_ID_PCM_ALAW, pcm_alaw);
-PCM_CODEC (CODEC_ID_PCM_MULAW, pcm_mulaw);
-PCM_CODEC (CODEC_ID_PCM_ZORK, pcm_zork);
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-04 23:24:40 +0000