diff options
author | atmos4 <atmos4@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-03-19 21:48:55 +0000 |
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committer | atmos4 <atmos4@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-03-19 21:48:55 +0000 |
commit | 9ed76eba4bd653bbd8c198787a44893c69881875 (patch) | |
tree | 334c7507a22e223e9b249137d2e8155075094285 /libmpdemux | |
parent | 682288117ea901749ebdff0deb1c98abb4825e98 (diff) |
allow sh_audio struct to be initialized by demuxer, add parsing of mp4 esds header to mov demuxer, init faad from info from mov header
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5207 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpdemux')
-rw-r--r-- | libmpdemux/demux_mov.c | 70 |
1 files changed, 69 insertions, 1 deletions
diff --git a/libmpdemux/demux_mov.c b/libmpdemux/demux_mov.c index 3bf5cbf141..385087f1cb 100644 --- a/libmpdemux/demux_mov.c +++ b/libmpdemux/demux_mov.c @@ -562,9 +562,37 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak mov_build_index(trak); switch(trak->type){ case MOV_TRAK_AUDIO: { +#if 0 + struct { + int16_t version; // 0 or 1 (version 1 is qt3.0+) + int16_t revision; // 0 + int32_t vendor_id; // 0 + int16_t channels; // 1 or 2 (Mono/Stereo) + int16_t samplesize; // 8 or 16 (8Bit/16Bit) + int16_t compression_id; // if version 0 then 0 + // if version 1 and vbr then -2 else 0 + int16_t packet_size; // 0 + uint32_t sample_rate; // samplerate (Hz) + // qt3.0+ (version == 1) + uint32_t samples_per_packet; // 0 or num uncompressed samples in a packet + // if 0 below three values are also 0 + uint32_t bytes_per_packet; // 0 or num compressed bytes for one channel + uint32_t bytes_per_frame; // 0 or num compressed bytes for all channels + // (channels * bytes_per_packet) + uint32_t bytes_per_sample; // 0 or size of uncompressed sample + // if samples_per_packet and bytes_per_packet are constant (CBR) + // then bytes_per_frame and bytes_per_sample must be 0 (else is VBR) + // --- + // optional additional atom-based fields + // ([int32_t size,int32_t type,some data ],repeat) + } my_stdata; +#endif sh_audio_t* sh=new_sh_audio(demuxer,priv->track_db); sh->format=trak->fourcc; +// assumptions for below table: short is 16bit, int is 32bit +// short values are usually one byte leftpadded by zero +// int values are usually two byte leftpadded by zero // stdata[]: // 8 short version // 10 short revision @@ -579,8 +607,48 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak // 32 int bytes_per_packet // 36 int bytes_per_frame // 40 int bytes_per_sample +// my recoveries from .mp4 files with correct index (counting from 0): +// it's always start with padding/real start +// 8/ 9 short version +// 10/11 short revision +// 12/14 int vendor_id +// 16/17 short channels +// 18/19 short samplesize +// 20/21 short compression_id +// 22/23 short packet_size (XXX: this overlaps with sample_rate ?) +// 22/24 int sample_rate +// esds atom: +// 28/31 int atom size (bytes of int size, int type and data) +// 32/32 int atom type (fourc charater code -> esds) +// 62/63 int compressed datarate (Bits) + +#define char2short(x,y) ((x[y]<<8)|x[y+1]) +#define char2int(x,y) ((x[y]<<24)|(x[y+1]<<16)|(x[y+2]<<8)|x[y+3]) + + sh->samplesize=char2short(trak->stdata,18)/8; + sh->channels=char2short(trak->stdata,16); + sh->samplerate=char2short(trak->stdata,24); - mp_msg(MSGT_DEMUX, MSGL_INFO, "Audio bits: %d chans: %d\n",trak->stdata[19],trak->stdata[17]); + mp_msg(MSGT_DEMUX, MSGL_INFO, "Audio bits: %d chans: %d\n", + trak->stdata[19],trak->stdata[17]); + mp_msg(MSGT_DEMUX, MSGL_INFO, "Audio sample rate: %d\n", + char2short(trak->stdata,24)); + if((trak->stdata[9]==0) && trak->stdata_len >= 36) { // version 0 with extra atoms + int atom_len = char2int(trak->stdata,28); + switch(char2int(trak->stdata,32)) { // atom type + case MOV_FOURCC('e','s','d','s'): + mp_msg(MSGT_DEMUX, MSGL_INFO, "MOV: MP4 esds audio atom found (%d)!\n", atom_len); + if(atom_len >= 28) + mp_msg(MSGT_DEMUX, MSGL_INFO, "Audio compressed datarate: %dkbit/s\n", + char2int(trak->stdata,62)/1000); + sh->i_bps=char2int(trak->stdata,62)/8; + break; + default: + mp_msg(MSGT_DEMUX, MSGL_INFO, "MOV: unknown audio atom %c%c%c%c found (%d)!\n", + trak->stdata[32],trak->stdata[33],trak->stdata[34],trak->stdata[35], + atom_len); + } + } mp_msg(MSGT_DEMUX, MSGL_INFO, "Fourcc: %.4s\n",&trak->fourcc); #if 0 { FILE* f=fopen("stdata.dat","wb"); |