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dec_audio: uncrustify

This commit is contained in:
wm4 2013-01-31 10:44:15 +01:00
parent a1be0e1aec
commit bb8da97205
2 changed files with 203 additions and 193 deletions
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393
audio/decode/dec_audio.c
View File

@ -39,25 +39,26 @@
int fakemono = 0;
struct af_cfg af_cfg = { 1, NULL }; // Configuration for audio filters
struct af_cfg af_cfg = {1, NULL}; // Configuration for audio filters
void afm_help(void)
{
int i;
mp_tmsg(MSGT_DECAUDIO, MSGL_INFO, "Available (compiled-in) audio codec families/drivers:\n");
mp_tmsg(MSGT_DECAUDIO, MSGL_INFO,
"Available (compiled-in) audio codec families/drivers:\n");
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AUDIO_DRIVERS\n");
mp_msg(MSGT_DECAUDIO, MSGL_INFO, " afm: info: (comment)\n");
for (i = 0; mpcodecs_ad_drivers[i] != NULL; i++)
if (mpcodecs_ad_drivers[i]->info->comment
&& mpcodecs_ad_drivers[i]->info->comment[0])
mp_msg(MSGT_DECAUDIO, MSGL_INFO, "%9s %s (%s)\n",
mpcodecs_ad_drivers[i]->info->short_name,
mpcodecs_ad_drivers[i]->info->name,
mpcodecs_ad_drivers[i]->info->comment);
else
mp_msg(MSGT_DECAUDIO, MSGL_INFO, "%9s %s\n",
mpcodecs_ad_drivers[i]->info->short_name,
mpcodecs_ad_drivers[i]->info->name);
if (mpcodecs_ad_drivers[i]->info->comment
&& mpcodecs_ad_drivers[i]->info->comment[0])
mp_msg(MSGT_DECAUDIO, MSGL_INFO, "%9s %s (%s)\n",
mpcodecs_ad_drivers[i]->info->short_name,
mpcodecs_ad_drivers[i]->info->name,
mpcodecs_ad_drivers[i]->info->comment);
else
mp_msg(MSGT_DECAUDIO, MSGL_INFO, "%9s %s\n",
mpcodecs_ad_drivers[i]->info->short_name,
mpcodecs_ad_drivers[i]->info->name);
}
static int init_audio_codec(sh_audio_t *sh_audio)
@ -67,33 +68,36 @@ static int init_audio_codec(sh_audio_t *sh_audio)
sh_audio->samplesize = 2;
sh_audio->sample_format = AF_FORMAT_S16_NE;
if ((af_cfg.force & AF_INIT_FORMAT_MASK) == AF_INIT_FLOAT) {
int fmt = AF_FORMAT_FLOAT_NE;
if (sh_audio->ad_driver->control(sh_audio, ADCTRL_QUERY_FORMAT,
&fmt) == CONTROL_TRUE) {
sh_audio->sample_format = fmt;
sh_audio->samplesize = 4;
}
int fmt = AF_FORMAT_FLOAT_NE;
if (sh_audio->ad_driver->control(sh_audio, ADCTRL_QUERY_FORMAT,
&fmt) == CONTROL_TRUE) {
sh_audio->sample_format = fmt;
sh_audio->samplesize = 4;
}
}
sh_audio->audio_out_minsize = 8192; // default, preinit() may change it
if (!sh_audio->ad_driver->preinit(sh_audio)) {
mp_tmsg(MSGT_DECAUDIO, MSGL_ERR, "ADecoder preinit failed :(\n");
return 0;
mp_tmsg(MSGT_DECAUDIO, MSGL_ERR, "ADecoder preinit failed :(\n");
return 0;
}
/* allocate audio in buffer: */
if (sh_audio->audio_in_minsize > 0) {
sh_audio->a_in_buffer_size = sh_audio->audio_in_minsize;
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "dec_audio: Allocating %d bytes for input buffer.\n",
sh_audio->a_in_buffer_size);
sh_audio->a_in_buffer = av_mallocz(sh_audio->a_in_buffer_size);
sh_audio->a_in_buffer_size = sh_audio->audio_in_minsize;
mp_tmsg(MSGT_DECAUDIO, MSGL_V,
"dec_audio: Allocating %d bytes for input buffer.\n",
sh_audio->a_in_buffer_size);
sh_audio->a_in_buffer = av_mallocz(sh_audio->a_in_buffer_size);
}
const int base_size = 65536;
// At least 64 KiB plus rounding up to next decodable unit size
sh_audio->a_buffer_size = base_size + sh_audio->audio_out_minsize;
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "dec_audio: Allocating %d + %d = %d bytes for output buffer.\n",
sh_audio->audio_out_minsize, base_size, sh_audio->a_buffer_size);
mp_tmsg(MSGT_DECAUDIO, MSGL_V,
"dec_audio: Allocating %d + %d = %d bytes for output buffer.\n",
sh_audio->audio_out_minsize, base_size,
sh_audio->a_buffer_size);
sh_audio->a_buffer = av_mallocz(sh_audio->a_buffer_size);
if (!sh_audio->a_buffer)
@ -101,134 +105,138 @@ static int init_audio_codec(sh_audio_t *sh_audio)
sh_audio->a_buffer_len = 0;
if (!sh_audio->ad_driver->init(sh_audio)) {
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "ADecoder init failed :(\n");
uninit_audio(sh_audio); // free buffers
return 0;
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "ADecoder init failed :(\n");
uninit_audio(sh_audio); // free buffers
return 0;
}
sh_audio->initialized = 1;
if (!sh_audio->channels || !sh_audio->samplerate) {
mp_tmsg(MSGT_DECAUDIO, MSGL_ERR, "Audio decoder did not specify "
mp_tmsg(MSGT_DECAUDIO, MSGL_ERR, "Audio decoder did not specify "
"audio format!\n");
uninit_audio(sh_audio); // free buffers
return 0;
uninit_audio(sh_audio); // free buffers
return 0;
}
if (!sh_audio->o_bps)
sh_audio->o_bps = sh_audio->channels * sh_audio->samplerate
* sh_audio->samplesize;
sh_audio->o_bps = sh_audio->channels * sh_audio->samplerate
* sh_audio->samplesize;
return 1;
}
static int init_audio(sh_audio_t *sh_audio, char *codecname, char *afm,
int status, stringset_t *selected)
int status, stringset_t *selected)
{
int force = 0;
if (codecname && codecname[0] == '+') {
codecname = &codecname[1];
force = 1;
codecname = &codecname[1];
force = 1;
}
sh_audio->codec = NULL;
while (1) {
const ad_functions_t *mpadec;
sh_audio->ad_driver = 0;
if (!(sh_audio->codec = find_audio_codec(sh_audio->format,
NULL,
sh_audio->codec, force)))
break;
// ok we found one codec
if (stringset_test(selected, sh_audio->codec->name))
continue; // already tried & failed
if (codecname && strcmp(sh_audio->codec->name, codecname))
continue; // -ac
if (afm && strcmp(sh_audio->codec->drv, afm))
continue; // afm doesn't match
if (!force && sh_audio->codec->status < status)
continue; // too unstable
stringset_add(selected, sh_audio->codec->name); // tagging it
// ok, it matches all rules, let's find the driver!
const ad_functions_t *mpadec;
sh_audio->ad_driver = 0;
if (!(sh_audio->codec = find_audio_codec(sh_audio->format, NULL,
sh_audio->codec, force)))
break;
// ok we found one codec
if (stringset_test(selected, sh_audio->codec->name))
continue; // already tried & failed
if (codecname && strcmp(sh_audio->codec->name, codecname))
continue; // -ac
if (afm && strcmp(sh_audio->codec->drv, afm))
continue; // afm doesn't match
if (!force && sh_audio->codec->status < status)
continue; // too unstable
stringset_add(selected, sh_audio->codec->name); // tagging it
// ok, it matches all rules, let's find the driver!
int i;
for (i = 0; mpcodecs_ad_drivers[i] != NULL; i++)
if (!strcmp(mpcodecs_ad_drivers[i]->info->short_name,
sh_audio->codec->drv))
break;
mpadec = mpcodecs_ad_drivers[i];
if (!mpadec) { // driver not available (==compiled in)
mp_tmsg(MSGT_DECAUDIO, MSGL_ERR,
"Requested audio codec family [%s] (afm=%s) not available.\nEnable it at compilation.\n",
sh_audio->codec->name, sh_audio->codec->drv);
continue;
}
// it's available, let's try to init!
// init()
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "Opening audio decoder: [%s] %s\n",
mpadec->info->short_name, mpadec->info->name);
sh_audio->ad_driver = mpadec;
if (!init_audio_codec(sh_audio)) {
for (i = 0; mpcodecs_ad_drivers[i] != NULL; i++)
if (!strcmp(mpcodecs_ad_drivers[i]->info->short_name,
sh_audio->codec->drv))
break;
mpadec = mpcodecs_ad_drivers[i];
if (!mpadec) { // driver not available (==compiled in)
mp_tmsg(MSGT_DECAUDIO, MSGL_ERR, "Requested audio codec family "
"[%s] (afm=%s) not available.\nEnable it at compilation.\n",
sh_audio->codec->name, sh_audio->codec->drv);
continue;
}
// it's available, let's try to init!
// init()
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "Opening audio decoder: [%s] %s\n",
mpadec->info->short_name, mpadec->info->name);
sh_audio->ad_driver = mpadec;
if (!init_audio_codec(sh_audio)) {
mp_tmsg(MSGT_DECAUDIO, MSGL_WARN, "Audio decoder init failed for "
"codecs.conf entry \"%s\".\n", sh_audio->codec->name);
continue; // try next...
}
// Yeah! We got it!
return 1;
continue; // try next...
}
// Yeah! We got it!
return 1;
}
return 0;
}
int init_best_audio_codec(sh_audio_t *sh_audio, char **audio_codec_list,
char **audio_fm_list)
char **audio_fm_list)
{
stringset_t selected;
char *ac_l_default[2] = { "", (char *) NULL };
char *ac_l_default[2] = {
"", (char *) NULL
};
// hack:
if (!audio_codec_list)
audio_codec_list = ac_l_default;
audio_codec_list = ac_l_default;
// Go through the codec.conf and find the best codec...
sh_audio->initialized = 0;
stringset_init(&selected);
while (!sh_audio->initialized && *audio_codec_list) {
char *audio_codec = *(audio_codec_list++);
if (audio_codec[0]) {
if (audio_codec[0] == '-') {
// disable this codec:
stringset_add(&selected, audio_codec + 1);
} else {
// forced codec by name:
mp_tmsg(MSGT_DECAUDIO, MSGL_INFO, "Forced audio codec: %s\n",
audio_codec);
init_audio(sh_audio, audio_codec, NULL, -1, &selected);
}
} else {
int status;
// try in stability order: UNTESTED, WORKING, BUGGY.
// never try CRASHING.
if (audio_fm_list) {
char **fmlist = audio_fm_list;
// try first the preferred codec families:
while (!sh_audio->initialized && *fmlist) {
char *audio_fm = *(fmlist++);
mp_tmsg(MSGT_DECAUDIO, MSGL_INFO, "Trying to force audio codec driver family %s...\n",
audio_fm);
for (status = CODECS_STATUS__MAX;
status >= CODECS_STATUS__MIN; --status)
if (init_audio(sh_audio, NULL, audio_fm, status, &selected))
break;
}
}
if (!sh_audio->initialized)
for (status = CODECS_STATUS__MAX; status >= CODECS_STATUS__MIN;
--status)
if (init_audio(sh_audio, NULL, NULL, status, &selected))
break;
}
char *audio_codec = *(audio_codec_list++);
if (audio_codec[0]) {
if (audio_codec[0] == '-') {
// disable this codec:
stringset_add(&selected, audio_codec + 1);
} else {
// forced codec by name:
mp_tmsg(MSGT_DECAUDIO, MSGL_INFO, "Forced audio codec: %s\n",
audio_codec);
init_audio(sh_audio, audio_codec, NULL, -1, &selected);
}
} else {
int status;
// try in stability order: UNTESTED, WORKING, BUGGY.
// never try CRASHING.
if (audio_fm_list) {
char **fmlist = audio_fm_list;
// try first the preferred codec families:
while (!sh_audio->initialized && *fmlist) {
char *audio_fm = *(fmlist++);
mp_tmsg(MSGT_DECAUDIO, MSGL_INFO,
"Trying to force audio codec driver family %s...\n",
audio_fm);
for (status = CODECS_STATUS__MAX;
status >= CODECS_STATUS__MIN; --status)
if (init_audio(sh_audio, NULL, audio_fm, status,
&selected))
break;
}
}
if (!sh_audio->initialized)
for (status = CODECS_STATUS__MAX; status >= CODECS_STATUS__MIN;
--status)
if (init_audio(sh_audio, NULL, NULL, status, &selected))
break;
}
}
stringset_free(&selected);
if (!sh_audio->initialized) {
mp_tmsg(MSGT_DECAUDIO, MSGL_ERR, "Cannot find codec for audio format 0x%X.\n",
sh_audio->format);
return 0; // failed
mp_tmsg(MSGT_DECAUDIO, MSGL_ERR,
"Cannot find codec for audio format 0x%X.\n",
sh_audio->format);
return 0; // failed
}
mp_tmsg(MSGT_DECAUDIO, MSGL_INFO, "Selected audio codec: %s [%s]\n",
@ -238,17 +246,17 @@ int init_best_audio_codec(sh_audio_t *sh_audio, char **audio_codec_list,
sh_audio->ad_driver->info->short_name);
mp_tmsg(MSGT_DECAUDIO, MSGL_V,
"Audio codecs.conf entry: %s (%s) afm: %s\n",
sh_audio->codec->name, sh_audio->codec->info, sh_audio->codec->drv);
sh_audio->codec->name, sh_audio->codec->info, sh_audio->codec->drv);
mp_msg(MSGT_DECAUDIO, MSGL_V,
"AUDIO: %d Hz, %d ch, %s, %3.1f kbit/%3.2f%% (ratio: %d->%d)\n",
sh_audio->samplerate, sh_audio->channels,
af_fmt2str_short(sh_audio->sample_format),
sh_audio->i_bps * 8 * 0.001,
((float) sh_audio->i_bps / sh_audio->o_bps) * 100.0,
sh_audio->i_bps, sh_audio->o_bps);
"AUDIO: %d Hz, %d ch, %s, %3.1f kbit/%3.2f%% (ratio: %d->%d)\n",
sh_audio->samplerate, sh_audio->channels,
af_fmt2str_short(sh_audio->sample_format),
sh_audio->i_bps * 8 * 0.001,
((float) sh_audio->i_bps / sh_audio->o_bps) * 100.0,
sh_audio->i_bps, sh_audio->o_bps);
mp_msg(MSGT_IDENTIFY, MSGL_INFO,
"ID_AUDIO_BITRATE=%d\nID_AUDIO_RATE=%d\n" "ID_AUDIO_NCH=%d\n",
sh_audio->i_bps * 8, sh_audio->samplerate, sh_audio->channels);
"ID_AUDIO_BITRATE=%d\nID_AUDIO_RATE=%d\n" "ID_AUDIO_NCH=%d\n",
sh_audio->i_bps * 8, sh_audio->samplerate, sh_audio->channels);
return 1; // success
}
@ -256,16 +264,16 @@ int init_best_audio_codec(sh_audio_t *sh_audio, char **audio_codec_list,
void uninit_audio(sh_audio_t *sh_audio)
{
if (sh_audio->afilter) {
mp_msg(MSGT_DECAUDIO, MSGL_V, "Uninit audio filters...\n");
af_uninit(sh_audio->afilter);
free(sh_audio->afilter);
sh_audio->afilter = NULL;
mp_msg(MSGT_DECAUDIO, MSGL_V, "Uninit audio filters...\n");
af_uninit(sh_audio->afilter);
free(sh_audio->afilter);
sh_audio->afilter = NULL;
}
if (sh_audio->initialized) {
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "Uninit audio: %s\n",
sh_audio->codec->drv);
sh_audio->ad_driver->uninit(sh_audio);
sh_audio->initialized = 0;
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "Uninit audio: %s\n",
sh_audio->codec->drv);
sh_audio->ad_driver->uninit(sh_audio);
sh_audio->initialized = 0;
}
av_freep(&sh_audio->a_buffer);
av_freep(&sh_audio->a_in_buffer);
@ -273,12 +281,12 @@ void uninit_audio(sh_audio_t *sh_audio)
int init_audio_filters(sh_audio_t *sh_audio, int in_samplerate,
int *out_samplerate, int *out_channels, int *out_format)
int *out_samplerate, int *out_channels, int *out_format)
{
struct af_stream *afs = sh_audio->afilter;
if (!afs) {
afs = calloc(1, sizeof(struct af_stream));
afs->opts = sh_audio->opts;
afs = calloc(1, sizeof(struct af_stream));
afs->opts = sh_audio->opts;
}
// input format: same as codec's output format:
afs->input.rate = in_samplerate;
@ -295,16 +303,17 @@ int init_audio_filters(sh_audio_t *sh_audio, int in_samplerate,
// filter config:
memcpy(&afs->cfg, &af_cfg, sizeof(struct af_cfg));
mp_tmsg(MSGT_DECAUDIO, MSGL_V, "Building audio filter chain for %dHz/%dch/%s -> %dHz/%dch/%s...\n",
afs->input.rate, afs->input.nch,
af_fmt2str_short(afs->input.format), afs->output.rate,
afs->output.nch, af_fmt2str_short(afs->output.format));
mp_tmsg(MSGT_DECAUDIO, MSGL_V,
"Building audio filter chain for %dHz/%dch/%s -> %dHz/%dch/%s...\n",
afs->input.rate, afs->input.nch,
af_fmt2str_short(afs->input.format), afs->output.rate,
afs->output.nch, af_fmt2str_short(afs->output.format));
// let's autoprobe it!
if (0 != af_init(afs)) {
sh_audio->afilter = NULL;
free(afs);
return 0; // failed :(
sh_audio->afilter = NULL;
free(afs);
return 0; // failed :(
}
*out_samplerate = afs->output.rate;
@ -321,15 +330,15 @@ static void set_min_out_buffer_size(struct bstr *outbuf, int len)
size_t oldlen = talloc_get_size(outbuf->start);
if (oldlen < len) {
assert(outbuf->start); // talloc context should be already set
mp_msg(MSGT_DECAUDIO, MSGL_V, "Increasing filtered audio buffer size "
"from %zd to %d\n", oldlen, len);
mp_msg(MSGT_DECAUDIO, MSGL_V, "Increasing filtered audio buffer size "
"from %zd to %d\n", oldlen, len);
outbuf->start = talloc_realloc_size(NULL, outbuf->start, len);
}
}
static int filter_n_bytes(sh_audio_t *sh, struct bstr *outbuf, int len)
{
assert(len-1 + sh->audio_out_minsize <= sh->a_buffer_size);
assert(len - 1 + sh->audio_out_minsize <= sh->a_buffer_size);
int error = 0;
@ -338,34 +347,34 @@ static int filter_n_bytes(sh_audio_t *sh, struct bstr *outbuf, int len)
int old_channels = sh->channels;
int old_sample_format = sh->sample_format;
while (sh->a_buffer_len < len) {
unsigned char *buf = sh->a_buffer + sh->a_buffer_len;
int minlen = len - sh->a_buffer_len;
int maxlen = sh->a_buffer_size - sh->a_buffer_len;
int ret = sh->ad_driver->decode_audio(sh, buf, minlen, maxlen);
int format_change = sh->samplerate != old_samplerate
unsigned char *buf = sh->a_buffer + sh->a_buffer_len;
int minlen = len - sh->a_buffer_len;
int maxlen = sh->a_buffer_size - sh->a_buffer_len;
int ret = sh->ad_driver->decode_audio(sh, buf, minlen, maxlen);
int format_change = sh->samplerate != old_samplerate
|| sh->channels != old_channels
|| sh->sample_format != old_sample_format;
if (ret <= 0 || format_change) {
error = format_change ? -2 : -1;
if (ret <= 0 || format_change) {
error = format_change ? -2 : -1;
// samples from format-changing call get discarded too
len = sh->a_buffer_len;
break;
}
sh->a_buffer_len += ret;
len = sh->a_buffer_len;
break;
}
sh->a_buffer_len += ret;
}
// Filter
struct mp_audio filter_input = {
.audio = sh->a_buffer,
.len = len,
.rate = sh->samplerate,
.nch = sh->channels,
.format = sh->sample_format
.audio = sh->a_buffer,
.len = len,
.rate = sh->samplerate,
.nch = sh->channels,
.format = sh->sample_format
};
af_fix_parameters(&filter_input);
struct mp_audio *filter_output = af_play(sh->afilter, &filter_input);
if (!filter_output)
return -1;
return -1;
set_min_out_buffer_size(outbuf, outbuf->len + filter_output->len);
memcpy(outbuf->start + outbuf->len, filter_output->audio,
filter_output->len);
@ -407,29 +416,29 @@ int decode_audio(sh_audio_t *sh_audio, struct bstr *outbuf, int minlen)
return -1;
max_decode_len -= max_decode_len % unitsize;
while (minlen >=0 && outbuf->len < minlen) {
int declen = (minlen - outbuf->len) / filter_multiplier
+ (unitsize << 5); // some extra for possible filter buffering
if (huge_filter_buffer)
/* Some filter must be doing significant buffering if the estimated
* input length didn't produce enough output from filters.
* Feed the filters 2k bytes at a time until we have enough output.
* Very small amounts could make filtering inefficient while large
* amounts can make MPlayer demux the file unnecessarily far ahead
* to get audio data and buffer video frames in memory while doing
* so. However the performance impact of either is probably not too
* significant as long as the value is not completely insane. */
declen = 2000;
declen -= declen % unitsize;
if (declen > max_decode_len)
declen = max_decode_len;
else
/* if this iteration does not fill buffer, we must have lots
* of buffering in filters */
huge_filter_buffer = 1;
int res = filter_n_bytes(sh_audio, outbuf, declen);
if (res < 0)
return res;
while (minlen >= 0 && outbuf->len < minlen) {
// + some extra for possible filter buffering
int declen = (minlen - outbuf->len) / filter_multiplier + (unitsize << 5);
if (huge_filter_buffer)
/* Some filter must be doing significant buffering if the estimated
* input length didn't produce enough output from filters.
* Feed the filters 2k bytes at a time until we have enough output.
* Very small amounts could make filtering inefficient while large
* amounts can make MPlayer demux the file unnecessarily far ahead
* to get audio data and buffer video frames in memory while doing
* so. However the performance impact of either is probably not too
* significant as long as the value is not completely insane. */
declen = 2000;
declen -= declen % unitsize;
if (declen > max_decode_len)
declen = max_decode_len;
else
/* if this iteration does not fill buffer, we must have lots
* of buffering in filters */
huge_filter_buffer = 1;
int res = filter_n_bytes(sh_audio, outbuf, declen);
if (res < 0)
return res;
}
return 0;
}
@ -445,20 +454,20 @@ void decode_audio_prepend_bytes(struct bstr *outbuf, int count, int byte)
void resync_audio_stream(sh_audio_t *sh_audio)
{
sh_audio->a_in_buffer_len = 0; // clear audio input buffer
sh_audio->a_in_buffer_len = 0; // clear audio input buffer
sh_audio->pts = MP_NOPTS_VALUE;
if (!sh_audio->initialized)
return;
return;
sh_audio->ad_driver->control(sh_audio, ADCTRL_RESYNC_STREAM, NULL);
}
void skip_audio_frame(sh_audio_t *sh_audio)
{
if (!sh_audio->initialized)
return;
if (sh_audio->ad_driver->control(sh_audio, ADCTRL_SKIP_FRAME, NULL) ==
CONTROL_TRUE)
return;
return;
if (sh_audio->ad_driver->control(sh_audio, ADCTRL_SKIP_FRAME, NULL)
== CONTROL_TRUE)
return;
// default skip code:
ds_fill_buffer(sh_audio->ds); // skip block
ds_fill_buffer(sh_audio->ds); // skip block
}

3
audio/decode/dec_audio.h
View File

@ -25,7 +25,8 @@ struct bstr;
// dec_audio.c:
void afm_help(void);
int init_best_audio_codec(sh_audio_t *sh_audio, char** audio_codec_list, char** audio_fm_list);
int init_best_audio_codec(sh_audio_t *sh_audio, char **audio_codec_list,
char **audio_fm_list);
int decode_audio(sh_audio_t *sh_audio, struct bstr *outbuf, int minlen);
void decode_audio_prepend_bytes(struct bstr *outbuf, int count, int byte);
void resync_audio_stream(sh_audio_t *sh_audio);