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ima adpcm/swf adpcm: corrects the problem the noise occurs after the play ends.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25052 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Yoshihisa Uchida 2010-03-07 07:27:45 +00:00
parent f640b89a12
commit 1e9789879f
2 changed files with 38 additions and 44 deletions
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72
apps/codecs/libpcm/dvi_adpcm.c
View file

@ -67,7 +67,7 @@ static struct pcm_pos *get_seek_pos(long seek_time,
return &newpos;
}
static inline void decode_2bit(const uint8_t **inbuf,
static inline void decode_2bit(const uint8_t **inbuf, size_t inbufsize,
int32_t **outbuf, int *outbufcount)
{
int ch;
@ -75,7 +75,7 @@ static inline void decode_2bit(const uint8_t **inbuf,
int32_t *pcmbuf;
int samples;
samples = fmt->blockalign / (4 * fmt->channels) - 1;
samples = inbufsize / (4 * fmt->channels) - 1;
*outbufcount += (samples << 4);
while (samples-- > 0)
{
@ -99,7 +99,7 @@ static inline void decode_2bit(const uint8_t **inbuf,
}
}
static inline void decode_3bit(const uint8_t **inbuf,
static inline void decode_3bit(const uint8_t **inbuf, size_t inbufsize,
int32_t **outbuf, int *outbufcount)
{
const uint8_t *adpcmbuf;
@ -109,7 +109,7 @@ static inline void decode_3bit(const uint8_t **inbuf,
int32_t *pcmbuf;
int samples;
samples = (fmt->blockalign - 4 * fmt->channels) / (12 * fmt->channels);
samples = (inbufsize - 4 * fmt->channels) / (12 * fmt->channels);
*outbufcount += (samples << 5);
while (samples--)
{
@ -157,7 +157,7 @@ static inline void decode_3bit(const uint8_t **inbuf,
}
}
static inline void decode_4bit(const uint8_t **inbuf,
static inline void decode_4bit(const uint8_t **inbuf, size_t inbufsize,
int32_t **outbuf, int *outbufcount)
{
int ch;
@ -165,7 +165,7 @@ static inline void decode_4bit(const uint8_t **inbuf,
int32_t *pcmbuf;
int samples;
samples = fmt->blockalign / (4 * fmt->channels) - 1;
samples = inbufsize / (4 * fmt->channels) - 1;
*outbufcount += (samples << 3);
while (samples-- > 0)
{
@ -185,7 +185,7 @@ static inline void decode_4bit(const uint8_t **inbuf,
}
}
static inline void decode_5bit(const uint8_t **inbuf,
static inline void decode_5bit(const uint8_t **inbuf, size_t inbufsize,
int32_t **outbuf, int *outbufcount)
{
const uint8_t *adpcmbuf;
@ -195,7 +195,7 @@ static inline void decode_5bit(const uint8_t **inbuf,
int32_t *pcmbuf;
int samples;
samples = (fmt->blockalign - 4 * fmt->channels) / (20 * fmt->channels);
samples = (inbufsize - 4 * fmt->channels) / (20 * fmt->channels);
*outbufcount += (samples << 5);
while (samples--)
{
@ -257,46 +257,40 @@ static int decode(const uint8_t *inbuf, size_t inbufsize,
int32_t *outbuf, int *outbufcount)
{
int ch;
unsigned int i;
int32_t init_pcmdata[2];
int8_t init_index[2];
unsigned int nblocks = fmt->chunksize / fmt->blockalign;
(void)inbufsize;
*outbufcount = 0;
for (i = 0; i < nblocks; i++)
for (ch = 0; ch < fmt->channels; ch++)
{
for (ch = 0; ch < fmt->channels; ch++)
init_pcmdata[ch] = inbuf[0] | (inbuf[1] << 8);
if (init_pcmdata[ch] > 32767)
init_pcmdata[ch] -= 65536;
init_index[ch] = inbuf[2];
if (init_index[ch] > 88 || init_index[ch] < 0)
{
init_pcmdata[ch] = inbuf[0] | (inbuf[1] << 8);
if (init_pcmdata[ch] > 32767)
init_pcmdata[ch] -= 65536;
init_index[ch] = inbuf[2];
if (init_index[ch] > 88 || init_index[ch] < 0)
{
DEBUGF("CODEC_ERROR: dvi adpcm illegal step index=%d > 88\n",
init_index[ch]);
return CODEC_ERROR;
}
inbuf += 4;
*outbuf++ = init_pcmdata[ch] << IMA_ADPCM_INC_DEPTH;
DEBUGF("CODEC_ERROR: dvi adpcm illegal step index=%d > 88\n",
init_index[ch]);
return CODEC_ERROR;
}
inbuf += 4;
*outbufcount += 1;
set_decode_parameters(fmt->channels, init_pcmdata, init_index);
if (fmt->bitspersample == 4)
decode_4bit(&inbuf, &outbuf, outbufcount);
else if (fmt->bitspersample == 3)
decode_3bit(&inbuf, &outbuf, outbufcount);
else if (fmt->bitspersample == 5)
decode_5bit(&inbuf, &outbuf, outbufcount);
else /* fmt->bitspersample == 2 */
decode_2bit(&inbuf, &outbuf, outbufcount);
*outbuf++ = init_pcmdata[ch] << IMA_ADPCM_INC_DEPTH;
}
*outbufcount += 1;
set_decode_parameters(fmt->channels, init_pcmdata, init_index);
if (fmt->bitspersample == 4)
decode_4bit(&inbuf, inbufsize, &outbuf, outbufcount);
else if (fmt->bitspersample == 3)
decode_3bit(&inbuf, inbufsize, &outbuf, outbufcount);
else if (fmt->bitspersample == 5)
decode_5bit(&inbuf, inbufsize, &outbuf, outbufcount);
else /* fmt->bitspersample == 2 */
decode_2bit(&inbuf, inbufsize, &outbuf, outbufcount);
return CODEC_OK;
}

10
apps/codecs/libpcm/swf_adpcm.c
View file

@ -47,6 +47,8 @@ static bool after_seek = false;
static struct pcm_format *fmt;
#define GET_SAMPLE_COUNT(s) ((((s) << 3) / fmt->channels - 22) / fmt->bitspersample + 1)
static bool set_format(struct pcm_format *format)
{
fmt = format;
@ -139,14 +141,14 @@ static int decode(const uint8_t *inbuf, size_t inbufsize,
{
int ch;
int adpcm_code_size;
int count = fmt->samplesperblock;
int count = ((size_t)fmt->chunksize == inbufsize) ? fmt->samplesperblock :
GET_SAMPLE_COUNT(inbufsize);
int32_t init_pcmdata[2];
int8_t init_index[2];
static uint8_t lastbyte = 0;
(void)inbufsize;
validity_bits = 8;
*outbufcount = count;
/* read block header */
ch = fmt->channels - 1;
@ -208,8 +210,6 @@ static int decode(const uint8_t *inbuf, size_t inbufsize,
<< IMA_ADPCM_INC_DEPTH;
}
*outbufcount = fmt->samplesperblock;
lastbyte = *inbuf;
lastbytebits = (8 - validity_bits) & 0x07;