From 93cb9d7f733d0f03cc0cbe03c95f70024abd208e Mon Sep 17 00:00:00 2001 From: Mike Melanson Date: Wed, 15 Oct 2003 03:53:40 +0000 Subject: [PATCH] hook up the XA ADPCM decoder Originally committed as revision 2386 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/psxstr.c | 128 ++++++++++++++++++++++++++----------------- 1 file changed, 77 insertions(+), 51 deletions(-) diff --git a/libavformat/psxstr.c b/libavformat/psxstr.c index 3b1933c04e..f0159c6339 100644 --- a/libavformat/psxstr.c +++ b/libavformat/psxstr.c @@ -89,8 +89,11 @@ typedef struct StrDemuxContext { int64_t pts; unsigned char *video_chunk; + AVPacket tmp_pkt; } StrDemuxContext; +const static char sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00}; + static int str_probe(AVProbeData *p) { int start; @@ -108,12 +111,7 @@ static int str_probe(AVProbeData *p) start = 0; /* look for CD sync header (00, 0xFF x 10, 00) */ - if ((p->buf[start + 0] != 0x00) || (p->buf[start + 1] != 0xFF) || - (p->buf[start + 2] != 0xFF) || (p->buf[start + 3] != 0xFF) || - (p->buf[start + 4] != 0xFF) || (p->buf[start + 5] != 0xFF) || - (p->buf[start + 6] != 0xFF) || (p->buf[start + 7] != 0xFF) || - (p->buf[start + 8] != 0xFF) || (p->buf[start + 9] != 0xFF) || - (p->buf[start + 10] != 0xFF) || (p->buf[start + 11] != 0x00)) + if (memcmp(p->buf+start,sync_header,sizeof(sync_header))) return 0; /* MPEG files (like those ripped from VCDs) can also look like this; @@ -121,6 +119,17 @@ static int str_probe(AVProbeData *p) return 50; } +static void dump(unsigned char *buf,size_t len) +{ + int i; + for(i=0;i= 32) return AVERROR_INVALIDDATA; @@ -193,6 +204,7 @@ static int str_read_header(AVFormatContext *s, case CDXA_TYPE_AUDIO: /* check if this channel gets to be the dominant audio channel */ if (str->audio_channel == -1) { + int fmt; str->audio_channel = channel; str->channels[channel].type = STR_AUDIO; str->channels[channel].channels = @@ -201,6 +213,22 @@ static int str_read_header(AVFormatContext *s, (sector[0x13] & 0x04) ? 18900 : 37800; str->channels[channel].bits = (sector[0x13] & 0x10) ? 8 : 4; + + /* allocate a new AVStream */ + st = av_new_stream(s, 0); + if (!st) + return AVERROR_NOMEM; + + str->channels[channel].audio_stream_index = st->index; + + fmt = sector[0x13]; + st->codec.codec_type = CODEC_TYPE_AUDIO; + st->codec.codec_id = CODEC_ID_ADPCM_XA; + st->codec.codec_tag = 0; /* no fourcc */ + st->codec.channels = (fmt&1)?2:1; + st->codec.sample_rate = (fmt&4)?18900:37800; + // st->codec.bit_rate = 0; //FIXME; + st->codec.block_align = 128; } break; @@ -211,15 +239,15 @@ static int str_read_header(AVFormatContext *s, } if (str->video_channel != -1) - printf (" video channel = %d, %d x %d\n", str->video_channel, + printf (" video channel = %d, %d x %d %d\n", str->video_channel, str->channels[str->video_channel].width, - str->channels[str->video_channel].height); + str->channels[str->video_channel].height,str->channels[str->video_channel].video_stream_index); if (str->audio_channel != -1) - printf (" audio channel = %d, %d Hz, %d channels, %d bits/sample\n", - str->video_channel, - str->channels[str->video_channel].sample_rate, - str->channels[str->video_channel].channels, - str->channels[str->video_channel].bits); + printf (" audio channel = %d, %d Hz, %d channels, %d bits/sample %d\n", + str->audio_channel, + str->channels[str->audio_channel].sample_rate, + str->channels[str->audio_channel].channels, + str->channels[str->audio_channel].bits,str->channels[str->audio_channel].audio_stream_index); /* back to the start */ url_fseek(pb, start, SEEK_SET); @@ -228,19 +256,15 @@ if (str->audio_channel != -1) } static int str_read_packet(AVFormatContext *s, - AVPacket *pkt) + AVPacket *ret_pkt) { ByteIOContext *pb = &s->pb; StrDemuxContext *str = (StrDemuxContext *)s->priv_data; unsigned char sector[RAW_CD_SECTOR_SIZE]; int channel; int packet_read = 0; - int video_sector_count = 0; - int current_video_sector = 0; - int video_frame_size = 0; - int video_frame_index = 0; - int bytes_to_copy; int ret = 0; + AVPacket *pkt; while (!packet_read) { @@ -258,16 +282,20 @@ static int str_read_packet(AVFormatContext *s, /* check if this the video channel we care about */ if (channel == str->video_channel) { + int current_sector = LE_16(§or[0x1C]); + int sector_count = LE_16(§or[0x1E]); + int frame_size = LE_32(§or[0x24]); + int bytes_to_copy; +// printf("%d %d %d\n",current_sector,sector_count,frame_size); /* if this is the first sector of the frame, allocate a pkt */ - if (current_video_sector == 0) { - video_frame_size = LE_32(§or[0x24]); - video_sector_count = LE_16(§or[0x1E]); - if (av_new_packet(pkt, video_frame_size)) + pkt = &str->tmp_pkt; + if (current_sector == 0) { + if (av_new_packet(pkt, frame_size)) return -EIO; pkt->stream_index = str->channels[channel].video_stream_index; - pkt->pts = str->pts; + // pkt->pts = str->pts; /* if there is no audio, adjust the pts after every video * frame; assume 15 fps */ @@ -276,32 +304,16 @@ static int str_read_packet(AVFormatContext *s, } /* load all the constituent chunks in the video packet */ - if (video_frame_size - video_frame_index < VIDEO_DATA_CHUNK_SIZE) - bytes_to_copy = video_frame_size - video_frame_index; - else - bytes_to_copy = VIDEO_DATA_CHUNK_SIZE; - if (video_frame_index < video_frame_size) - memcpy(&pkt->data[video_frame_index], - §or[VIDEO_DATA_HEADER_SIZE], bytes_to_copy); - -#ifdef PRINTSTUFF -printf (" chunk %d/%d (bytes %d/%d), first 6 bytes = %02X %02X %02X %02X %02X %02X\n", - current_video_sector, video_sector_count, - video_frame_index, video_frame_size, - pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 0], - pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 1], - pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 2], - pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 3], - pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 4], - pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 5]); -#endif - - video_frame_index += bytes_to_copy; - /* must keep reading sectors until all current video sectors - * are consumed */ - current_video_sector++; - if (current_video_sector >= video_sector_count) - packet_read = 1; + bytes_to_copy = frame_size - current_sector*VIDEO_DATA_CHUNK_SIZE; + if (bytes_to_copy>0) { + if (bytes_to_copy>VIDEO_DATA_CHUNK_SIZE) bytes_to_copy=VIDEO_DATA_CHUNK_SIZE; + memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE, + sector + VIDEO_DATA_HEADER_SIZE, bytes_to_copy); + } + if (current_sector == sector_count-1) { + *ret_pkt = *pkt; + return 0; + } } break; @@ -310,7 +322,21 @@ printf (" chunk %d/%d (bytes %d/%d), first 6 bytes = %02X %02X %02X %02X %02X % #ifdef PRINTSTUFF printf (" dropping audio sector\n"); #endif - break; +#if 1 + /* check if this the video channel we care about */ + if (channel == str->audio_channel) { + pkt = ret_pkt; + if (av_new_packet(pkt, 2304)) + return -EIO; + memcpy(pkt->data,sector+24,2304); + + pkt->stream_index = + str->channels[channel].audio_stream_index; + //pkt->pts = str->pts; + return 0; + } +#endif + break; default: /* drop the sector and move on */ #ifdef PRINTSTUFF