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author | reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2005-07-10 17:14:12 +0000 |
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committer | reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2005-07-10 17:14:12 +0000 |
commit | c54b5a06bd40fba8a37c7053cd7437785e9a7314 (patch) | |
tree | 721cc55674c56e735addc44c4b647f2627f4cb1f /libmpdemux/demux_mpc.c | |
parent | cd19f28b94690a828a0304961e8b5d5721a77ea2 (diff) | |
download | mpv-c54b5a06bd40fba8a37c7053cd7437785e9a7314.tar.bz2 mpv-c54b5a06bd40fba8a37c7053cd7437785e9a7314.tar.xz |
musepack demuxing and decoding support (demuxing is v7 bitstream only).
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@15959 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpdemux/demux_mpc.c')
-rw-r--r-- | libmpdemux/demux_mpc.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/libmpdemux/demux_mpc.c b/libmpdemux/demux_mpc.c new file mode 100644 index 0000000000..b422073841 --- /dev/null +++ b/libmpdemux/demux_mpc.c @@ -0,0 +1,145 @@ + +#include "config.h" + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include "mp_msg.h" +#include "bswap.h" +#include "stream.h" +#include "demuxer.h" +#include "stheader.h" + + +#define HDR_SIZE (6 * 4) + +typedef struct da_priv { + float last_pts; + uint32_t dword; + int pos; +} da_priv_t; + +extern void free_sh_audio(sh_audio_t* sh); + +static uint32_t get_bits(da_priv_t* priv, stream_t* s, int bits) { + uint32_t out = priv->dword; + uint32_t mask = (1 << bits) - 1; + priv->pos += bits; + if (priv->pos < 32) { + out >>= (32 - priv->pos); + } + else { + stream_read(s, (void *)&priv->dword, 4); + le2me_32(priv->dword); + priv->pos -= 32; + if (priv->pos) { + out <<= priv->pos; + out |= priv->dword >> (32 - priv->pos); + } + } + return out & mask; +} + +int demux_mpc_open(demuxer_t* demuxer) { + stream_t *s = demuxer->stream; + sh_audio_t* sh_audio; + uint8_t hdr[HDR_SIZE]; + da_priv_t* priv; + int i; + + if (stream_read(s, hdr, HDR_SIZE) != HDR_SIZE) + return 0; + for (i = 0; i < 30000 && !s->eof; i++) { + if (hdr[0] == 'M' && hdr[1] == 'P' && hdr[2] == '+') + break; + memmove(hdr, &hdr[1], HDR_SIZE - 1); + stream_read(s, &hdr[HDR_SIZE - 1], 1); + } + + if (hdr[0] != 'M' || hdr[1] != 'P' || hdr[2] != '+') + return 0; + + sh_audio = new_sh_audio(demuxer,0); + + { + char *wf = (char *)calloc(1, sizeof(WAVEFORMATEX) + HDR_SIZE); + char *header = &wf[sizeof(WAVEFORMATEX)]; + const int freqs[4] = {44100, 48000, 37800, 32000}; + sh_audio->format = mmioFOURCC('M', 'P', 'C', ' '); + memcpy(header, hdr, HDR_SIZE); + sh_audio->wf = (WAVEFORMATEX *)wf; + sh_audio->wf->wFormatTag = sh_audio->format; + sh_audio->wf->nChannels = 2; + sh_audio->wf->nSamplesPerSec = freqs[header[10] & 3]; + sh_audio->wf->nBlockAlign = 32 * 36; + sh_audio->wf->wBitsPerSample = 16; + sh_audio->wf->nAvgBytesPerSec = 128 * 1024; // dummy to make mencoder not hang + sh_audio->wf->cbSize = HDR_SIZE; + demuxer->movi_start = stream_tell(s); + demuxer->movi_end = s->end_pos; + } + + priv = (da_priv_t *)malloc(sizeof(da_priv_t)); + priv->last_pts = -1; + priv->dword = 0; + priv->pos = 0; + stream_read(s, (void *)&priv->dword, 4); + priv->pos = 8; + demuxer->priv = priv; + demuxer->audio->id = 0; + demuxer->audio->sh = sh_audio; + sh_audio->ds = demuxer->audio; + sh_audio->samplerate = sh_audio->wf->nSamplesPerSec; + sh_audio->i_bps = sh_audio->wf->nAvgBytesPerSec; + sh_audio->audio.dwSampleSize = 0; + sh_audio->audio.dwScale = 32 * 36; + sh_audio->audio.dwRate = sh_audio->samplerate; + + return 1; +} + +int demux_mpc_fill_buffer(demux_stream_t *ds) { + int l; + int bit_len; + demux_packet_t* dp; + sh_audio_t* sh_audio = ds->sh; + demuxer_t* demux = ds->demuxer; + da_priv_t* priv = demux->priv; + stream_t* s = demux->stream; + sh_audio = ds->sh; + + if (s->eof) + return 0; + + bit_len = get_bits(priv, s, 20); + dp = new_demux_packet((bit_len + 7) / 8); + for (l = 0; l < (bit_len / 8); l++) + dp->buffer[l] = get_bits(priv, s, 8); + bit_len %= 8; + if (bit_len) + dp->buffer[l] = get_bits(priv, s, bit_len) << (8 - bit_len); + if (priv->last_pts < 0) + priv->last_pts = 0; + else + priv->last_pts += (36 * 32) / (float)sh_audio->samplerate; + ds->pts = priv->last_pts - (ds_tell_pts(demux->audio) - + sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps; + ds_add_packet(ds, dp); + return 1; +} + +void demux_mpc_seek(demuxer_t *demuxer,float rel_seek_secs,int flags){ +// TODO +} + +void demux_close_mpc(demuxer_t* demuxer) { + da_priv_t* priv = demuxer->priv; + + if(!priv) + return; + free(priv); +} + +int demux_mpc_control(demuxer_t *demuxer,int cmd, void *arg){ + return DEMUXER_CTRL_NOTIMPL; +} |