3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "libavutil/common.h" /* for av_reverse */
29 #include "bytestream.h"
31 #include "pcm_tablegen.h"
33 #define MAX_CHANNELS 64
35 static av_cold int pcm_encode_init(AVCodecContext *avctx)
37 avctx->frame_size = 0;
38 switch (avctx->codec->id) {
39 case CODEC_ID_PCM_ALAW:
42 case CODEC_ID_PCM_MULAW:
49 avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
50 avctx->block_align = avctx->channels * avctx->bits_per_coded_sample / 8;
51 avctx->bit_rate = avctx->block_align * avctx->sample_rate * 8;
52 avctx->coded_frame = avcodec_alloc_frame();
53 if (!avctx->coded_frame)
54 return AVERROR(ENOMEM);
59 static av_cold int pcm_encode_close(AVCodecContext *avctx)
61 av_freep(&avctx->coded_frame);
67 * Write PCM samples macro
68 * @param type Datatype of native machine format
69 * @param endian bytestream_put_xxx() suffix
70 * @param src Source pointer (variable name)
71 * @param dst Destination pointer (variable name)
72 * @param n Total number of samples (variable name)
73 * @param shift Bitshift (bits)
74 * @param offset Sample value offset
76 #define ENCODE(type, endian, src, dst, n, shift, offset) \
77 samples_ ## type = (const type *) src; \
78 for (; n > 0; n--) { \
79 register type v = (*samples_ ## type++ >> shift) + offset; \
80 bytestream_put_ ## endian(&dst, v); \
83 static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
84 const AVFrame *frame, int *got_packet_ptr)
86 int n, sample_size, v, ret;
90 const int16_t *samples_int16_t;
91 const int32_t *samples_int32_t;
92 const int64_t *samples_int64_t;
93 const uint16_t *samples_uint16_t;
94 const uint32_t *samples_uint32_t;
96 sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
97 n = frame->nb_samples * avctx->channels;
98 samples = (const short *)frame->data[0];
100 if ((ret = ff_alloc_packet(avpkt, n * sample_size))) {
101 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
106 switch (avctx->codec->id) {
107 case CODEC_ID_PCM_U32LE:
108 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
110 case CODEC_ID_PCM_U32BE:
111 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
113 case CODEC_ID_PCM_S24LE:
114 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
116 case CODEC_ID_PCM_S24BE:
117 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
119 case CODEC_ID_PCM_U24LE:
120 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
122 case CODEC_ID_PCM_U24BE:
123 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
125 case CODEC_ID_PCM_S24DAUD:
127 uint32_t tmp = av_reverse[(*samples >> 8) & 0xff] +
128 (av_reverse[*samples & 0xff] << 8);
129 tmp <<= 4; // sync flags would go here
130 bytestream_put_be24(&dst, tmp);
134 case CODEC_ID_PCM_U16LE:
135 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
137 case CODEC_ID_PCM_U16BE:
138 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
140 case CODEC_ID_PCM_S8:
141 srcu8 = frame->data[0];
148 case CODEC_ID_PCM_F64LE:
149 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
151 case CODEC_ID_PCM_S32LE:
152 case CODEC_ID_PCM_F32LE:
153 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
155 case CODEC_ID_PCM_S16LE:
156 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
158 case CODEC_ID_PCM_F64BE:
159 case CODEC_ID_PCM_F32BE:
160 case CODEC_ID_PCM_S32BE:
161 case CODEC_ID_PCM_S16BE:
163 case CODEC_ID_PCM_F64BE:
164 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
166 case CODEC_ID_PCM_F32BE:
167 case CODEC_ID_PCM_S32BE:
168 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
170 case CODEC_ID_PCM_S16BE:
171 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
173 case CODEC_ID_PCM_F64LE:
174 case CODEC_ID_PCM_F32LE:
175 case CODEC_ID_PCM_S32LE:
176 case CODEC_ID_PCM_S16LE:
177 #endif /* HAVE_BIGENDIAN */
178 case CODEC_ID_PCM_U8:
179 memcpy(dst, samples, n * sample_size);
180 dst += n * sample_size;
182 case CODEC_ID_PCM_ALAW:
185 *dst++ = linear_to_alaw[(v + 32768) >> 2];
188 case CODEC_ID_PCM_MULAW:
191 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
202 typedef struct PCMDecode {
207 static av_cold int pcm_decode_init(AVCodecContext *avctx)
209 PCMDecode *s = avctx->priv_data;
212 if (avctx->channels <= 0 || avctx->channels > MAX_CHANNELS) {
213 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
214 return AVERROR(EINVAL);
217 switch (avctx->codec->id) {
218 case CODEC_ID_PCM_ALAW:
219 for (i = 0; i < 256; i++)
220 s->table[i] = alaw2linear(i);
222 case CODEC_ID_PCM_MULAW:
223 for (i = 0; i < 256; i++)
224 s->table[i] = ulaw2linear(i);
230 avctx->sample_fmt = avctx->codec->sample_fmts[0];
232 if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
233 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
235 avcodec_get_frame_defaults(&s->frame);
236 avctx->coded_frame = &s->frame;
242 * Read PCM samples macro
243 * @param size Data size of native machine format
244 * @param endian bytestream_get_xxx() endian suffix
245 * @param src Source pointer (variable name)
246 * @param dst Destination pointer (variable name)
247 * @param n Total number of samples (variable name)
248 * @param shift Bitshift (bits)
249 * @param offset Sample value offset
251 #define DECODE(size, endian, src, dst, n, shift, offset) \
252 for (; n > 0; n--) { \
253 uint ## size ## _t v = bytestream_get_ ## endian(&src); \
254 AV_WN ## size ## A(dst, (v - offset) << shift); \
258 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
259 int *got_frame_ptr, AVPacket *avpkt)
261 const uint8_t *src = avpkt->data;
262 int buf_size = avpkt->size;
263 PCMDecode *s = avctx->priv_data;
264 int sample_size, c, n, ret, samples_per_block;
266 int32_t *dst_int32_t;
268 sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
270 /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */
271 samples_per_block = 1;
272 if (CODEC_ID_PCM_DVD == avctx->codec_id) {
273 if (avctx->bits_per_coded_sample != 20 &&
274 avctx->bits_per_coded_sample != 24) {
275 av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
276 return AVERROR(EINVAL);
278 /* 2 samples are interleaved per block in PCM_DVD */
279 samples_per_block = 2;
280 sample_size = avctx->bits_per_coded_sample * 2 / 8;
281 } else if (avctx->codec_id == CODEC_ID_PCM_LXF) {
282 /* we process 40-bit blocks per channel for LXF */
283 samples_per_block = 2;
287 if (sample_size == 0) {
288 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
289 return AVERROR(EINVAL);
292 n = avctx->channels * sample_size;
294 if (n && buf_size % n) {
296 av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
299 buf_size -= buf_size % n;
302 n = buf_size / sample_size;
304 /* get output buffer */
305 s->frame.nb_samples = n * samples_per_block / avctx->channels;
306 if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
307 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
310 samples = s->frame.data[0];
312 switch (avctx->codec->id) {
313 case CODEC_ID_PCM_U32LE:
314 DECODE(32, le32, src, samples, n, 0, 0x80000000)
316 case CODEC_ID_PCM_U32BE:
317 DECODE(32, be32, src, samples, n, 0, 0x80000000)
319 case CODEC_ID_PCM_S24LE:
320 DECODE(32, le24, src, samples, n, 8, 0)
322 case CODEC_ID_PCM_S24BE:
323 DECODE(32, be24, src, samples, n, 8, 0)
325 case CODEC_ID_PCM_U24LE:
326 DECODE(32, le24, src, samples, n, 8, 0x800000)
328 case CODEC_ID_PCM_U24BE:
329 DECODE(32, be24, src, samples, n, 8, 0x800000)
331 case CODEC_ID_PCM_S24DAUD:
333 uint32_t v = bytestream_get_be24(&src);
334 v >>= 4; // sync flags are here
335 AV_WN16A(samples, av_reverse[(v >> 8) & 0xff] +
336 (av_reverse[v & 0xff] << 8));
340 case CODEC_ID_PCM_S16LE_PLANAR:
342 const uint8_t *src2[MAX_CHANNELS];
343 n /= avctx->channels;
344 for (c = 0; c < avctx->channels; c++)
345 src2[c] = &src[c * n * 2];
347 for (c = 0; c < avctx->channels; c++) {
348 AV_WN16A(samples, bytestream_get_le16(&src2[c]));
353 case CODEC_ID_PCM_U16LE:
354 DECODE(16, le16, src, samples, n, 0, 0x8000)
356 case CODEC_ID_PCM_U16BE:
357 DECODE(16, be16, src, samples, n, 0, 0x8000)
359 case CODEC_ID_PCM_S8:
361 *samples++ = *src++ + 128;
364 case CODEC_ID_PCM_F64LE:
365 DECODE(64, le64, src, samples, n, 0, 0)
367 case CODEC_ID_PCM_S32LE:
368 case CODEC_ID_PCM_F32LE:
369 DECODE(32, le32, src, samples, n, 0, 0)
371 case CODEC_ID_PCM_S16LE:
372 DECODE(16, le16, src, samples, n, 0, 0)
374 case CODEC_ID_PCM_F64BE:
375 case CODEC_ID_PCM_F32BE:
376 case CODEC_ID_PCM_S32BE:
377 case CODEC_ID_PCM_S16BE:
379 case CODEC_ID_PCM_F64BE:
380 DECODE(64, be64, src, samples, n, 0, 0)
382 case CODEC_ID_PCM_F32BE:
383 case CODEC_ID_PCM_S32BE:
384 DECODE(32, be32, src, samples, n, 0, 0)
386 case CODEC_ID_PCM_S16BE:
387 DECODE(16, be16, src, samples, n, 0, 0)
389 case CODEC_ID_PCM_F64LE:
390 case CODEC_ID_PCM_F32LE:
391 case CODEC_ID_PCM_S32LE:
392 case CODEC_ID_PCM_S16LE:
393 #endif /* HAVE_BIGENDIAN */
394 case CODEC_ID_PCM_U8:
395 memcpy(samples, src, n * sample_size);
397 case CODEC_ID_PCM_ZORK:
405 case CODEC_ID_PCM_ALAW:
406 case CODEC_ID_PCM_MULAW:
408 AV_WN16A(samples, s->table[*src++]);
412 case CODEC_ID_PCM_DVD:
415 dst_int32_t = (int32_t *)s->frame.data[0];
416 n /= avctx->channels;
417 switch (avctx->bits_per_coded_sample) {
423 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 & 0xf0) << 8);
424 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ & 0x0f) << 12);
434 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
435 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
443 case CODEC_ID_PCM_LXF:
447 dst_int32_t = (int32_t *)s->frame.data[0];
448 n /= avctx->channels;
449 // unpack and de-planarize
450 for (i = 0; i < n; i++) {
451 for (c = 0, src8 = src + i * 5; c < avctx->channels; c++, src8 += n * 5) {
452 // extract low 20 bits and expand to 32 bits
453 *dst_int32_t++ = (src8[2] << 28) |
456 ((src8[2] & 0xF) << 8) |
459 for (c = 0, src8 = src + i * 5; c < avctx->channels; c++, src8 += n * 5) {
460 // extract high 20 bits and expand to 32 bits
461 *dst_int32_t++ = (src8[4] << 24) |
463 ((src8[2] & 0xF0) << 8) |
475 *(AVFrame *)data = s->frame;
481 #define PCM_ENCODER(id_, sample_fmt_, name_, long_name_) \
482 AVCodec ff_ ## name_ ## _encoder = { \
484 .type = AVMEDIA_TYPE_AUDIO, \
486 .init = pcm_encode_init, \
487 .encode2 = pcm_encode_frame, \
488 .close = pcm_encode_close, \
489 .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \
490 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
491 AV_SAMPLE_FMT_NONE }, \
492 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
495 #define PCM_ENCODER(id, sample_fmt_, name, long_name_)
499 #define PCM_DECODER(id_, sample_fmt_, name_, long_name_) \
500 AVCodec ff_ ## name_ ## _decoder = { \
502 .type = AVMEDIA_TYPE_AUDIO, \
504 .priv_data_size = sizeof(PCMDecode), \
505 .init = pcm_decode_init, \
506 .decode = pcm_decode_frame, \
507 .capabilities = CODEC_CAP_DR1, \
508 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
509 AV_SAMPLE_FMT_NONE }, \
510 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
513 #define PCM_DECODER(id, sample_fmt_, name, long_name_)
516 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
517 PCM_ENCODER(id, sample_fmt_, name, long_name_); \
518 PCM_DECODER(id, sample_fmt_, name, long_name_)
520 /* Note: Do not forget to add new entries to the Makefile as well. */
521 PCM_CODEC (CODEC_ID_PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");
522 PCM_DECODER(CODEC_ID_PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
523 PCM_CODEC (CODEC_ID_PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
524 PCM_CODEC (CODEC_ID_PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
525 PCM_CODEC (CODEC_ID_PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
526 PCM_CODEC (CODEC_ID_PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
527 PCM_DECODER(CODEC_ID_PCM_LXF, AV_SAMPLE_FMT_S32, pcm_lxf, "PCM signed 20-bit little-endian planar");
528 PCM_CODEC (CODEC_ID_PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");
529 PCM_CODEC (CODEC_ID_PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
530 PCM_CODEC (CODEC_ID_PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
531 PCM_CODEC (CODEC_ID_PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
532 PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");
533 PCM_CODEC (CODEC_ID_PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
534 PCM_CODEC (CODEC_ID_PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
535 PCM_CODEC (CODEC_ID_PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
536 PCM_CODEC (CODEC_ID_PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
537 PCM_CODEC (CODEC_ID_PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
538 PCM_CODEC (CODEC_ID_PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
539 PCM_CODEC (CODEC_ID_PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
540 PCM_CODEC (CODEC_ID_PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
541 PCM_CODEC (CODEC_ID_PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
542 PCM_CODEC (CODEC_ID_PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
543 PCM_CODEC (CODEC_ID_PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
544 PCM_CODEC (CODEC_ID_PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
545 PCM_DECODER(CODEC_ID_PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");