mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
291 lines
8.0 KiB
291 lines
8.0 KiB
/* Electronic Arts Multimedia File Demuxer |
|
* Copyright (c) 2004 The ffmpeg Project |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
/** |
|
* @file electronicarts.c |
|
* Electronic Arts Multimedia file demuxer (WVE/UV2/etc.) |
|
* by Robin Kay (komadori at gekkou.co.uk) |
|
*/ |
|
|
|
#include "avformat.h" |
|
|
|
#define SCHl_TAG MKTAG('S', 'C', 'H', 'l') |
|
#define PT00_TAG MKTAG('P', 'T', 0x0, 0x0) |
|
#define SCDl_TAG MKTAG('S', 'C', 'D', 'l') |
|
#define pIQT_TAG MKTAG('p', 'I', 'Q', 'T') |
|
#define SCEl_TAG MKTAG('S', 'C', 'E', 'l') |
|
#define _TAG MKTAG('', '', '', '') |
|
|
|
#define EA_SAMPLE_RATE 22050 |
|
#define EA_BITS_PER_SAMPLE 16 |
|
#define EA_PREAMBLE_SIZE 8 |
|
|
|
typedef struct EaDemuxContext { |
|
int width; |
|
int height; |
|
int video_stream_index; |
|
int track_count; |
|
|
|
int audio_stream_index; |
|
int audio_frame_counter; |
|
|
|
int64_t audio_pts; |
|
int64_t video_pts; |
|
int video_pts_inc; |
|
float fps; |
|
|
|
int num_channels; |
|
int num_samples; |
|
int compression_type; |
|
} EaDemuxContext; |
|
|
|
static uint32_t read_arbitary(ByteIOContext *pb) { |
|
uint8_t size, byte; |
|
int i; |
|
uint32_t word; |
|
|
|
size = get_byte(pb); |
|
|
|
word = 0; |
|
for (i = 0; i < size; i++) { |
|
byte = get_byte(pb); |
|
word <<= 8; |
|
word |= byte; |
|
} |
|
|
|
return word; |
|
} |
|
|
|
/* |
|
* Process WVE file header |
|
* Returns 1 if the WVE file is valid and successfully opened, 0 otherwise |
|
*/ |
|
static int process_ea_header(AVFormatContext *s) { |
|
int inHeader; |
|
uint32_t blockid, size; |
|
EaDemuxContext *ea = (EaDemuxContext *)s->priv_data; |
|
ByteIOContext *pb = &s->pb; |
|
|
|
if (get_buffer(pb, (void*)&blockid, 4) != 4) { |
|
return 0; |
|
} |
|
if (le2me_32(blockid) != SCHl_TAG) { |
|
return 0; |
|
} |
|
|
|
if (get_buffer(pb, (void*)&size, 4) != 4) { |
|
return 0; |
|
} |
|
size = le2me_32(size); |
|
|
|
if (get_buffer(pb, (void*)&blockid, 4) != 4) { |
|
return 0; |
|
} |
|
if (le2me_32(blockid) != PT00_TAG) { |
|
av_log (s, AV_LOG_ERROR, "PT header missing\n"); |
|
return 0; |
|
} |
|
|
|
inHeader = 1; |
|
while (inHeader) { |
|
int inSubheader; |
|
uint8_t byte; |
|
byte = get_byte(pb) & 0xFF; |
|
|
|
switch (byte) { |
|
case 0xFD: |
|
av_log (s, AV_LOG_INFO, "entered audio subheader\n"); |
|
inSubheader = 1; |
|
while (inSubheader) { |
|
uint8_t subbyte; |
|
subbyte = get_byte(pb) & 0xFF; |
|
|
|
switch (subbyte) { |
|
case 0x82: |
|
ea->num_channels = read_arbitary(pb); |
|
av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels); |
|
break; |
|
case 0x83: |
|
ea->compression_type = read_arbitary(pb); |
|
av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", ea->compression_type); |
|
break; |
|
case 0x85: |
|
ea->num_samples = read_arbitary(pb); |
|
av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples); |
|
break; |
|
case 0x8A: |
|
av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb)); |
|
av_log (s, AV_LOG_INFO, "exited audio subheader\n"); |
|
inSubheader = 0; |
|
break; |
|
default: |
|
av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb)); |
|
break; |
|
} |
|
} |
|
break; |
|
case 0xFF: |
|
av_log (s, AV_LOG_INFO, "end of header block reached\n"); |
|
inHeader = 0; |
|
break; |
|
default: |
|
av_log (s, AV_LOG_INFO, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb)); |
|
break; |
|
} |
|
} |
|
|
|
if ((ea->num_channels != 2) || (ea->compression_type != 7)) { |
|
av_log (s, AV_LOG_ERROR, "unsupported stream type\n"); |
|
return 0; |
|
} |
|
|
|
/* skip to the start of the data */ |
|
url_fseek(pb, size, SEEK_SET); |
|
|
|
return 1; |
|
} |
|
|
|
|
|
static int ea_probe(AVProbeData *p) |
|
{ |
|
if (p->buf_size < 4) |
|
return 0; |
|
|
|
if (LE_32(&p->buf[0]) != SCHl_TAG) |
|
return 0; |
|
|
|
return AVPROBE_SCORE_MAX; |
|
} |
|
|
|
static int ea_read_header(AVFormatContext *s, |
|
AVFormatParameters *ap) |
|
{ |
|
EaDemuxContext *ea = (EaDemuxContext *)s->priv_data; |
|
AVStream *st; |
|
|
|
if (!process_ea_header(s)) |
|
return AVERROR_IO; |
|
|
|
#if 0 |
|
/* initialize the video decoder stream */ |
|
st = av_new_stream(s, 0); |
|
if (!st) |
|
return AVERROR_NOMEM; |
|
av_set_pts_info(st, 33, 1, 90000); |
|
ea->video_stream_index = st->index; |
|
st->codec->codec_type = CODEC_TYPE_VIDEO; |
|
st->codec->codec_id = CODEC_ID_EA_MJPEG; |
|
st->codec->codec_tag = 0; /* no fourcc */ |
|
#endif |
|
|
|
/* initialize the audio decoder stream */ |
|
st = av_new_stream(s, 0); |
|
if (!st) |
|
return AVERROR_NOMEM; |
|
av_set_pts_info(st, 33, 1, EA_SAMPLE_RATE); |
|
st->codec->codec_type = CODEC_TYPE_AUDIO; |
|
st->codec->codec_id = CODEC_ID_ADPCM_EA; |
|
st->codec->codec_tag = 0; /* no tag */ |
|
st->codec->channels = ea->num_channels; |
|
st->codec->sample_rate = EA_SAMPLE_RATE; |
|
st->codec->bits_per_sample = EA_BITS_PER_SAMPLE; |
|
st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * |
|
st->codec->bits_per_sample / 4; |
|
st->codec->block_align = st->codec->channels * st->codec->bits_per_sample; |
|
|
|
ea->audio_stream_index = st->index; |
|
ea->audio_frame_counter = 0; |
|
|
|
return 1; |
|
} |
|
|
|
static int ea_read_packet(AVFormatContext *s, |
|
AVPacket *pkt) |
|
{ |
|
EaDemuxContext *ea = s->priv_data; |
|
ByteIOContext *pb = &s->pb; |
|
int ret = 0; |
|
int packet_read = 0; |
|
unsigned char preamble[EA_PREAMBLE_SIZE]; |
|
unsigned int chunk_type, chunk_size; |
|
|
|
while (!packet_read) { |
|
|
|
if (get_buffer(pb, preamble, EA_PREAMBLE_SIZE) != EA_PREAMBLE_SIZE) |
|
return AVERROR_IO; |
|
chunk_type = LE_32(&preamble[0]); |
|
chunk_size = LE_32(&preamble[4]) - EA_PREAMBLE_SIZE; |
|
|
|
switch (chunk_type) { |
|
/* audio data */ |
|
case SCDl_TAG: |
|
ret = av_get_packet(pb, pkt, chunk_size); |
|
if (ret != chunk_size) |
|
ret = AVERROR_IO; |
|
else { |
|
pkt->stream_index = ea->audio_stream_index; |
|
pkt->pts = 90000; |
|
pkt->pts *= ea->audio_frame_counter; |
|
pkt->pts /= EA_SAMPLE_RATE; |
|
|
|
/* 2 samples/byte, 1 or 2 samples per frame depending |
|
* on stereo; chunk also has 12-byte header */ |
|
ea->audio_frame_counter += ((chunk_size - 12) * 2) / |
|
ea->num_channels; |
|
} |
|
|
|
packet_read = 1; |
|
break; |
|
|
|
/* ending tag */ |
|
case SCEl_TAG: |
|
ret = AVERROR_IO; |
|
packet_read = 1; |
|
break; |
|
|
|
default: |
|
url_fseek(pb, chunk_size, SEEK_CUR); |
|
break; |
|
} |
|
|
|
/* ending packet */ |
|
if (chunk_type == SCEl_TAG) { |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int ea_read_close(AVFormatContext *s) |
|
{ |
|
// EaDemuxContext *ea = (EaDemuxContext *)s->priv_data; |
|
|
|
return 0; |
|
} |
|
|
|
AVInputFormat ea_demuxer = { |
|
"ea", |
|
"Electronic Arts Multimedia Format", |
|
sizeof(EaDemuxContext), |
|
ea_probe, |
|
ea_read_header, |
|
ea_read_packet, |
|
ea_read_close, |
|
};
|
|
|