#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. */
* alaw2linear() - Convert an A-law value to 16-bit linear PCM
*
*/
-static int alaw2linear(unsigned char a_val)
+static av_cold int alaw2linear(unsigned char a_val)
{
int t;
int seg;
if(seg) t= (t + t + 1 + 32) << (seg + 2);
else t= (t + t + 1 ) << 3;
- return ((a_val & SIGN_BIT) ? t : -t);
+ return (a_val & SIGN_BIT) ? t : -t;
}
-static int ulaw2linear(unsigned char u_val)
+static av_cold int ulaw2linear(unsigned char u_val)
{
int t;
t = ((u_val & QUANT_MASK) << 3) + BIAS;
t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
- return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
+ 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,
+static av_cold void build_xlaw_table(uint8_t *linear_to_xlaw,
int (*xlaw2linear)(unsigned char),
int mask)
{
linear_to_xlaw[0] = linear_to_xlaw[1];
}
-static int pcm_encode_init(AVCodecContext *avctx)
+static av_cold int pcm_encode_init(AVCodecContext *avctx)
{
avctx->frame_size = 1;
switch(avctx->codec->id) {
return 0;
}
-static int pcm_encode_close(AVCodecContext *avctx)
+static av_cold int pcm_encode_close(AVCodecContext *avctx)
{
av_freep(&avctx->coded_frame);
*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++;
short table[256];
} PCMDecode;
-static int pcm_decode_init(AVCodecContext * avctx)
+static av_cold int pcm_decode_init(AVCodecContext * avctx)
{
PCMDecode *s = avctx->priv_data;
int i;
* \param src_len number of bytes in src
*/
static inline void decode_to16(int bps, int le, int us,
- uint8_t **src, short **samples, int src_len)
+ const uint8_t **src, short **samples, int src_len)
{
int usum = us ? -0x8000 : 0;
register int n = src_len / bps;
static int pcm_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
PCMDecode *s = avctx->priv_data;
- int n;
+ int c, n;
short *samples;
- uint8_t *src;
+ const uint8_t *src, *src2[MAX_CHANNELS];
samples = data;
src = buf;
- n= av_get_bits_per_sample(avctx->codec_id)/8;
+ if(avctx->channels <= 0 || avctx->channels > MAX_CHANNELS){
+ av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
+ return -1;
+ }
+
+ n = avctx->channels * 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 */
+ n = 2 * avctx->channels * avctx->bits_per_sample/8;
+
if(n && buf_size % n){
av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\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);
*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++ = ((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;
*samples++ = s->table[*src++];
}
break;
+ case CODEC_ID_PCM_DVD:
+ if(avctx->bits_per_sample != 20 && avctx->bits_per_sample != 24) {
+ av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
+ return -1;
+ } else {
+ int jump = avctx->channels * (avctx->bits_per_sample-16) / 4;
+ n = buf_size / (avctx->channels * 2 * avctx->bits_per_sample / 8);
+ while (n--) {
+ for (c=0; c < 2*avctx->channels; c++)
+ *samples++ = bytestream_get_be16(&src);
+ src += jump;
+ }
+ }
+ break;
default:
return -1;
}
return src - buf;
}
-#define PCM_CODEC(id, name) \
+#ifdef CONFIG_ENCODERS
+#define PCM_ENCODER(id,name,long_name_) \
AVCodec name ## _encoder = { \
#name, \
CODEC_TYPE_AUDIO, \
pcm_encode_frame, \
pcm_encode_close, \
NULL, \
-}; \
+ .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
+};
+#else
+#define PCM_ENCODER(id,name,long_name_)
+#endif
+
+#ifdef CONFIG_DECODERS
+#define PCM_DECODER(id,name,long_name_) \
AVCodec name ## _decoder = { \
#name, \
CODEC_TYPE_AUDIO, \
NULL, \
NULL, \
pcm_decode_frame, \
-}
-
-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_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);
-
-#undef PCM_CODEC
+ .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
+};
+#else
+#define PCM_DECODER(id,name,long_name_)
+#endif
+
+#define PCM_CODEC(id, name, long_name_) \
+ PCM_ENCODER(id,name,long_name_) PCM_DECODER(id,name,long_name_)
+
+/* Note: Do not forget to add new entries to the Makefile as well. */
+PCM_CODEC (CODEC_ID_PCM_ALAW, pcm_alaw, "A-law PCM");
+PCM_CODEC (CODEC_ID_PCM_DVD, pcm_dvd, "signed 16|20|24-bit big-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_MULAW, pcm_mulaw, "mu-law PCM");
+PCM_CODEC (CODEC_ID_PCM_S8, pcm_s8, "signed 8-bit PCM");
+PCM_CODEC (CODEC_ID_PCM_S16BE, pcm_s16be, "signed 16-bit big-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_S16LE, pcm_s16le, "signed 16-bit little-endian PCM");
+PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, pcm_s16le_planar, "16-bit little-endian planar PCM");
+PCM_CODEC (CODEC_ID_PCM_S24BE, pcm_s24be, "signed 24-bit big-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_S24DAUD, pcm_s24daud, "D-Cinema audio signed 24-bit PCM");
+PCM_CODEC (CODEC_ID_PCM_S24LE, pcm_s24le, "signed 24-bit little-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_S32BE, pcm_s32be, "signed 32-bit big-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_S32LE, pcm_s32le, "signed 32-bit little-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_U8, pcm_u8, "unsigned 8-bit PCM");
+PCM_CODEC (CODEC_ID_PCM_U16BE, pcm_u16be, "unsigned 16-bit big-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_U16LE, pcm_u16le, "unsigned 16-bit little-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_U24BE, pcm_u24be, "unsigned 24-bit big-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_U24LE, pcm_u24le, "unsigned 24-bit little-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_U32BE, pcm_u32be, "unsigned 32-bit big-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_U32LE, pcm_u32le, "unsigned 32-bit little-endian PCM");
+PCM_CODEC (CODEC_ID_PCM_ZORK, pcm_zork, "Zork PCM");
projects / ffmpeg / blobdiff