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author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-03-25 21:06:01 +0000 |
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committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-03-25 21:06:01 +0000 |
commit | 7c026066ea35886bddfda08a71c0cc8f170a5d86 (patch) | |
tree | 963bf77f55faf2b9795502065ef95878fade190a /libmpcodecs/ad_imaadpcm.c | |
parent | 94d3170bd0561939a0ec322860be1f28d711e271 (diff) | |
download | mpv-7c026066ea35886bddfda08a71c0cc8f170a5d86.tar.bz2 mpv-7c026066ea35886bddfda08a71c0cc8f170a5d86.tar.xz |
imported from MPlayerXP, dlopen() hack removed, some bugs fixed, interface functions changed to static, info->author field added
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5341 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpcodecs/ad_imaadpcm.c')
-rw-r--r-- | libmpcodecs/ad_imaadpcm.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/libmpcodecs/ad_imaadpcm.c b/libmpcodecs/ad_imaadpcm.c new file mode 100644 index 0000000000..eca064d6c5 --- /dev/null +++ b/libmpcodecs/ad_imaadpcm.c @@ -0,0 +1,59 @@ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include "config.h" +#include "ad_internal.h" + +#include "../adpcm.h" + +static ad_info_t info = +{ + "IMA ADPCM audio decoder", + "imaadpcm", + AFM_IMAADPCM, + "Nick Kurshev", + "Mike Melanson", + "ima4 (MOV files)" +}; + +LIBAD_EXTERN(imaadpcm) + +static int init(sh_audio_t *sh_audio) +{ + /* IMA-ADPCM 4:1 audio codec:*/ + sh_audio->channels=sh_audio->wf->nChannels; + sh_audio->samplerate=sh_audio->wf->nSamplesPerSec; + /* decodes 34 byte -> 64 short*/ + sh_audio->i_bps=IMA_ADPCM_BLOCK_SIZE*(sh_audio->channels*sh_audio->samplerate)/ + IMA_ADPCM_SAMPLES_PER_BLOCK; /* 1:4 */ + return 1; +} + +static int preinit(sh_audio_t *sh_audio) +{ + sh_audio->audio_out_minsize=4096; + sh_audio->ds->ss_div=IMA_ADPCM_SAMPLES_PER_BLOCK; + sh_audio->ds->ss_mul=IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels; + return 1; +} + +static void uninit(sh_audio_t *sh) +{ +} + +static int control(sh_audio_t *sh,int cmd,void* arg, ...) +{ + // TODO!!! + return CONTROL_UNKNOWN; +} + +static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen) +{ + unsigned char ibuf[IMA_ADPCM_BLOCK_SIZE * 2]; /* bytes / stereo frame */ + if (demux_read_data(sh_audio->ds, ibuf, + IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) != + IMA_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) + return -1; + return 2*ima_adpcm_decode_block((unsigned short*)buf,ibuf, sh_audio->wf->nChannels); +} |