mirror of
https://github.com/mpv-player/mpv
synced 2024-12-09 08:29:42 +00:00
4919658621
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10038 b3059339-0415-0410-9bf9-f77b7e298cf2
251 lines
7.6 KiB
C
251 lines
7.6 KiB
C
/*
|
|
RoQ file demuxer for the MPlayer program
|
|
by Mike Melanson
|
|
based on Dr. Tim Ferguson's RoQ document found at:
|
|
http://www.csse.monash.edu.au/~timf/videocodec.html
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "config.h"
|
|
#include "mp_msg.h"
|
|
#include "help_mp.h"
|
|
|
|
#include "stream.h"
|
|
#include "demuxer.h"
|
|
#include "stheader.h"
|
|
|
|
#define RoQ_INFO 0x1001
|
|
#define RoQ_QUAD_CODEBOOK 0x1002
|
|
#define RoQ_QUAD_VQ 0x1011
|
|
#define RoQ_SOUND_MONO 0x1020
|
|
#define RoQ_SOUND_STEREO 0x1021
|
|
|
|
#define CHUNK_TYPE_AUDIO 0
|
|
#define CHUNK_TYPE_VIDEO 1
|
|
|
|
typedef struct roq_chunk_t
|
|
{
|
|
int chunk_type;
|
|
off_t chunk_offset;
|
|
int chunk_size;
|
|
|
|
float video_chunk_number; // in the case of a video chunk
|
|
int running_audio_sample_count; // for an audio chunk
|
|
} roq_chunk_t;
|
|
|
|
typedef struct roq_data_t
|
|
{
|
|
int total_chunks;
|
|
int current_chunk;
|
|
int total_video_chunks;
|
|
int total_audio_sample_count;
|
|
roq_chunk_t *chunks;
|
|
} roq_data_t;
|
|
|
|
// Check if a stream qualifies as a RoQ file based on the magic numbers
|
|
// at the start of the file:
|
|
// 84 10 FF FF FF FF xx xx
|
|
int roq_check_file(demuxer_t *demuxer)
|
|
{
|
|
if ((stream_read_dword(demuxer->stream) == 0x8410FFFF) &&
|
|
((stream_read_dword(demuxer->stream) & 0xFFFF0000) == 0xFFFF0000))
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
// return value:
|
|
// 0 = EOF or no stream found
|
|
// 1 = successfully read a packet
|
|
int demux_roq_fill_buffer(demuxer_t *demuxer)
|
|
{
|
|
sh_video_t *sh_video = demuxer->video->sh;
|
|
roq_data_t *roq_data = (roq_data_t *)demuxer->priv;
|
|
roq_chunk_t roq_chunk;
|
|
|
|
if (roq_data->current_chunk >= roq_data->total_chunks)
|
|
return 0;
|
|
|
|
roq_chunk = roq_data->chunks[roq_data->current_chunk];
|
|
|
|
// make sure we're at the right place in the stream and fetch the chunk
|
|
stream_seek(demuxer->stream, roq_chunk.chunk_offset);
|
|
|
|
if (roq_chunk.chunk_type == CHUNK_TYPE_AUDIO)
|
|
ds_read_packet(demuxer->audio, demuxer->stream, roq_chunk.chunk_size,
|
|
0,
|
|
roq_chunk.chunk_offset, 0);
|
|
else
|
|
ds_read_packet(demuxer->video, demuxer->stream, roq_chunk.chunk_size,
|
|
roq_chunk.video_chunk_number / sh_video->fps,
|
|
roq_chunk.chunk_offset, 0);
|
|
|
|
roq_data->current_chunk++;
|
|
return 1;
|
|
}
|
|
|
|
demuxer_t* demux_open_roq(demuxer_t* demuxer)
|
|
{
|
|
sh_video_t *sh_video = NULL;
|
|
sh_audio_t *sh_audio = NULL;
|
|
|
|
roq_data_t *roq_data = (roq_data_t *)malloc(sizeof(roq_data_t));
|
|
int chunk_id;
|
|
int chunk_size;
|
|
int chunk_arg;
|
|
int last_chunk_id = 0;
|
|
int largest_audio_chunk = 0;
|
|
int fps;
|
|
|
|
roq_data->total_chunks = 0;
|
|
roq_data->current_chunk = 0;
|
|
roq_data->total_video_chunks = 0;
|
|
roq_data->chunks = NULL;
|
|
|
|
// position the stream and start traversing
|
|
stream_seek(demuxer->stream, 6);
|
|
fps = stream_read_word_le(demuxer->stream);
|
|
while (!stream_eof(demuxer->stream))
|
|
{
|
|
chunk_id = stream_read_word_le(demuxer->stream);
|
|
chunk_size = stream_read_dword_le(demuxer->stream);
|
|
chunk_arg = stream_read_word_le(demuxer->stream);
|
|
|
|
// this is the only useful header info in the file
|
|
if (chunk_id == RoQ_INFO)
|
|
{
|
|
// there should only be one RoQ_INFO chunk per file
|
|
if (sh_video)
|
|
{
|
|
mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Found more than one RoQ_INFO chunk\n");
|
|
stream_skip(demuxer->stream, 8);
|
|
}
|
|
else
|
|
{
|
|
// this is a good opportunity to create a video stream header
|
|
sh_video = new_sh_video(demuxer, 0);
|
|
// make sure the demuxer knows about the new stream header
|
|
demuxer->video->sh = sh_video;
|
|
// make sure that the video demuxer stream header knows about its
|
|
// parent video demuxer stream
|
|
sh_video->ds = demuxer->video;
|
|
|
|
sh_video->disp_w = stream_read_word_le(demuxer->stream);
|
|
sh_video->disp_h = stream_read_word_le(demuxer->stream);
|
|
stream_skip(demuxer->stream, 4);
|
|
|
|
// custom fourcc for internal MPlayer use
|
|
sh_video->format = mmioFOURCC('R', 'o', 'Q', 'V');
|
|
|
|
// constant frame rate
|
|
sh_video->fps = fps;
|
|
sh_video->frametime = 1 / sh_video->fps;
|
|
}
|
|
}
|
|
else if ((chunk_id == RoQ_SOUND_MONO) ||
|
|
(chunk_id == RoQ_SOUND_STEREO))
|
|
{
|
|
// create the audio stream header if it hasn't been created it
|
|
if (sh_audio == NULL)
|
|
{
|
|
// make the header first
|
|
sh_audio = new_sh_audio(demuxer, 0);
|
|
// make sure the demuxer knows about the new stream header
|
|
demuxer->audio->sh = sh_audio;
|
|
// make sure that the audio demuxer stream header knows about its
|
|
// parent audio demuxer stream
|
|
sh_audio->ds = demuxer->audio;
|
|
|
|
// go through the bother of making a WAVEFORMATEX structure
|
|
sh_audio->wf = (WAVEFORMATEX *)malloc(sizeof(WAVEFORMATEX));
|
|
|
|
// custom fourcc for internal MPlayer use
|
|
sh_audio->format = mmioFOURCC('R', 'o', 'Q', 'A');
|
|
if (chunk_id == RoQ_SOUND_STEREO)
|
|
sh_audio->wf->nChannels = 2;
|
|
else
|
|
sh_audio->wf->nChannels = 1;
|
|
// always 22KHz, 16-bit
|
|
sh_audio->wf->nSamplesPerSec = 22050;
|
|
sh_audio->wf->wBitsPerSample = 16;
|
|
}
|
|
|
|
// index the chunk
|
|
roq_data->chunks = (roq_chunk_t *)realloc(roq_data->chunks,
|
|
(roq_data->total_chunks + 1) * sizeof (roq_chunk_t));
|
|
roq_data->chunks[roq_data->total_chunks].chunk_type = CHUNK_TYPE_AUDIO;
|
|
roq_data->chunks[roq_data->total_chunks].chunk_offset =
|
|
stream_tell(demuxer->stream) - 8;
|
|
roq_data->chunks[roq_data->total_chunks].chunk_size = chunk_size + 8;
|
|
roq_data->chunks[roq_data->total_chunks].running_audio_sample_count =
|
|
roq_data->total_audio_sample_count;
|
|
|
|
// audio housekeeping
|
|
if (chunk_size > largest_audio_chunk)
|
|
largest_audio_chunk = chunk_size;
|
|
roq_data->total_audio_sample_count +=
|
|
(chunk_size / sh_audio->wf->nChannels);
|
|
|
|
stream_skip(demuxer->stream, chunk_size);
|
|
roq_data->total_chunks++;
|
|
}
|
|
else if ((chunk_id == RoQ_QUAD_CODEBOOK) ||
|
|
((chunk_id == RoQ_QUAD_VQ) && (last_chunk_id != RoQ_QUAD_CODEBOOK)))
|
|
{
|
|
// index a new chunk if it's a codebook or quad VQ not following a
|
|
// codebook
|
|
roq_data->chunks = (roq_chunk_t *)realloc(roq_data->chunks,
|
|
(roq_data->total_chunks + 1) * sizeof (roq_chunk_t));
|
|
roq_data->chunks[roq_data->total_chunks].chunk_type = CHUNK_TYPE_VIDEO;
|
|
roq_data->chunks[roq_data->total_chunks].chunk_offset =
|
|
stream_tell(demuxer->stream) - 8;
|
|
roq_data->chunks[roq_data->total_chunks].chunk_size = chunk_size + 8;
|
|
roq_data->chunks[roq_data->total_chunks].video_chunk_number =
|
|
roq_data->total_video_chunks++;
|
|
|
|
stream_skip(demuxer->stream, chunk_size);
|
|
roq_data->total_chunks++;
|
|
}
|
|
else if ((chunk_id == RoQ_QUAD_VQ) && (last_chunk_id == RoQ_QUAD_CODEBOOK))
|
|
{
|
|
// if it's a quad VQ chunk following a codebook chunk, extend the last
|
|
// chunk
|
|
roq_data->chunks[roq_data->total_chunks - 1].chunk_size += (chunk_size + 8);
|
|
stream_skip(demuxer->stream, chunk_size);
|
|
}
|
|
else if (!stream_eof(demuxer->stream))
|
|
{
|
|
mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Unknown RoQ chunk ID: %04X\n", chunk_id);
|
|
}
|
|
|
|
last_chunk_id = chunk_id;
|
|
}
|
|
|
|
// minimum output buffer size = largest audio chunk * 2, since each byte
|
|
// in the DPCM encoding effectively represents 1 16-bit sample
|
|
// (store it in wf->nBlockAlign for the time being since init_audio() will
|
|
// step on it anyway)
|
|
if (sh_audio)
|
|
sh_audio->wf->nBlockAlign = largest_audio_chunk * 2;
|
|
|
|
roq_data->current_chunk = 0;
|
|
|
|
demuxer->priv = roq_data;
|
|
|
|
stream_reset(demuxer->stream);
|
|
|
|
return demuxer;
|
|
}
|
|
|
|
void demux_close_roq(demuxer_t* demuxer) {
|
|
roq_data_t *roq_data = demuxer->priv;
|
|
|
|
if(!roq_data)
|
|
return;
|
|
free(roq_data);
|
|
}
|
|
|