diff --git a/libavformat/Makefile b/libavformat/Makefile index 0984c72a8d..7c46573fe2 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -15,7 +15,8 @@ PPOBJS= OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o raw.o rm.o \ avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dv.o \ yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o idroq.o ipmovie.o \ - nut.o wc3movie.o mp3.o westwood.o segafilm.o idcin.o flic.o + nut.o wc3movie.o mp3.o westwood.o segafilm.o idcin.o flic.o \ + sierravmd.o ifeq ($(CONFIG_RISKY),yes) OBJS+= asf.o diff --git a/libavformat/allformats.c b/libavformat/allformats.c index 9446c0c1a7..156f9783b7 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -70,6 +70,7 @@ void av_register_all(void) film_init(); idcin_init(); flic_init(); + vmd_init(); #if defined(AMR_NB) || defined(AMR_NB_FIXED) || defined(AMR_WB) amr_init(); diff --git a/libavformat/avformat.h b/libavformat/avformat.h index 1641aa22d3..64bea9c1cd 100644 --- a/libavformat/avformat.h +++ b/libavformat/avformat.h @@ -480,6 +480,9 @@ int idcin_init(void); /* flic.c */ int flic_init(void); +/* sierravmd.c */ +int vmd_init(void); + #include "rtp.h" #include "rtsp.h" diff --git a/libavformat/sierravmd.c b/libavformat/sierravmd.c new file mode 100644 index 0000000000..d0525b95c2 --- /dev/null +++ b/libavformat/sierravmd.c @@ -0,0 +1,263 @@ +/* + * Sierra VMD Format Demuxer + * Copyright (c) 2004 The ffmpeg Project + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/** + * @file sierravmd.c + * Sierra VMD file demuxer + * by Vladimir "VAG" Gneushev (vagsoft at mail.ru) + */ + +#include "avformat.h" + +#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0]) +#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \ + (((uint8_t*)(x))[2] << 16) | \ + (((uint8_t*)(x))[1] << 8) | \ + ((uint8_t*)(x))[0]) + +#define VMD_HEADER_SIZE 0x0330 +#define BYTES_PER_FRAME_RECORD 16 + +typedef struct { + int stream_index; + offset_t frame_offset; + unsigned int frame_size; + int64_t pts; + int keyframe; + unsigned char frame_record[BYTES_PER_FRAME_RECORD]; +} vmd_frame_t; + +typedef struct VmdDemuxContext { + int video_stream_index; + int audio_stream_index; + + unsigned int audio_type; + unsigned int audio_samplerate; + unsigned int audio_bits; + unsigned int audio_channels; + + unsigned int frame_count; + vmd_frame_t *frame_table; + unsigned int current_frame; + + unsigned char vmd_header[VMD_HEADER_SIZE]; +} VmdDemuxContext; + +static int vmd_probe(AVProbeData *p) +{ + if (p->buf_size < 2) + return 0; + + /* check if the first 2 bytes of the file contain the appropriate size + * of a VMD header chunk */ + if (LE_16(&p->buf[0]) != VMD_HEADER_SIZE - 2) + return 0; + + /* only return half certainty since this check is a bit sketchy */ + return AVPROBE_SCORE_MAX / 2; +} + +static int vmd_read_header(AVFormatContext *s, + AVFormatParameters *ap) +{ + VmdDemuxContext *vmd = (VmdDemuxContext *)s->priv_data; + ByteIOContext *pb = &s->pb; + AVStream *st; + unsigned int toc_offset; + unsigned char *raw_frame_table; + int raw_frame_table_size; + unsigned char *current_frame_record; + offset_t current_offset; + int i; + int sample_rate; + unsigned int total_frames; +int video_frame_count = 0; + + /* fetch the main header, including the 2 header length bytes */ + url_fseek(pb, 0, SEEK_SET); + if (get_buffer(pb, vmd->vmd_header, VMD_HEADER_SIZE) != VMD_HEADER_SIZE) + return -EIO; + + /* start up the decoders */ + st = av_new_stream(s, 0); + if (!st) + return AVERROR_NOMEM; + vmd->video_stream_index = st->index; + st->codec.codec_type = CODEC_TYPE_VIDEO; + st->codec.codec_id = CODEC_ID_VMDVIDEO; + st->codec.codec_tag = 0; /* no fourcc */ + st->codec.width = LE_16(&vmd->vmd_header[12]); + st->codec.height = LE_16(&vmd->vmd_header[14]); + st->codec.extradata_size = VMD_HEADER_SIZE; + st->codec.extradata = av_malloc(VMD_HEADER_SIZE); + memcpy(st->codec.extradata, vmd->vmd_header, VMD_HEADER_SIZE); + + /* if sample rate is 0, assume no audio */ + sample_rate = LE_16(&vmd->vmd_header[804]); + if (sample_rate) { + st = av_new_stream(s, 0); + if (!st) + return AVERROR_NOMEM; + vmd->audio_stream_index = st->index; + st->codec.codec_type = CODEC_TYPE_AUDIO; + st->codec.codec_id = CODEC_ID_VMDAUDIO; + st->codec.codec_tag = 0; /* no codec tag */ + st->codec.channels = (vmd->vmd_header[811] & 0x80) ? 2 : 1; + st->codec.sample_rate = sample_rate; + st->codec.bit_rate = st->codec.sample_rate * + st->codec.bits_per_sample * st->codec.channels; + st->codec.block_align = LE_16(&vmd->vmd_header[806]); + if (st->codec.block_align & 0x8000) { + st->codec.bits_per_sample = 16; + st->codec.block_align = -(st->codec.block_align - 0x10000); + } else + st->codec.bits_per_sample = 8; + } + + /* skip over the offset table and load the table of contents; don't + * care about the offset table since demuxer will calculate those + * independently */ + toc_offset = LE_32(&vmd->vmd_header[812]); + vmd->frame_count = LE_16(&vmd->vmd_header[6]); + url_fseek(pb, toc_offset + vmd->frame_count * 6, SEEK_SET); + + /* each on-disk VMD frame has an audio part and a video part; demuxer + * accounts them separately */ + vmd->frame_count *= 2; + raw_frame_table = NULL; + vmd->frame_table = NULL; + raw_frame_table_size = vmd->frame_count * BYTES_PER_FRAME_RECORD; + raw_frame_table = av_malloc(raw_frame_table_size); + vmd->frame_table = av_malloc(vmd->frame_count * sizeof(vmd_frame_t)); + if (!raw_frame_table || !vmd->frame_table) { + av_free(raw_frame_table); + av_free(vmd->frame_table); + return AVERROR_NOMEM; + } + if (get_buffer(pb, raw_frame_table, raw_frame_table_size) != + raw_frame_table_size) { + av_free(raw_frame_table); + av_free(vmd->frame_table); + return -EIO; + } + + current_offset = LE_32(&vmd->vmd_header[20]); + current_frame_record = raw_frame_table; + total_frames = vmd->frame_count; + i = 0; + while (total_frames--) { + + /* if the frame size is 0, do not count the frame and bring the + * total frame count down */ + vmd->frame_table[i].frame_size = LE_32(¤t_frame_record[2]); + + /* this logic is present so that 0-length audio chunks are not + * accounted */ + if (!vmd->frame_table[i].frame_size) { + vmd->frame_count--; /* one less frame to count */ + current_frame_record += BYTES_PER_FRAME_RECORD; + continue; + } + + if (current_frame_record[0] == 0x02) + vmd->frame_table[i].stream_index = vmd->video_stream_index; + else + vmd->frame_table[i].stream_index = vmd->audio_stream_index; + vmd->frame_table[i].frame_offset = current_offset; + current_offset += vmd->frame_table[i].frame_size; + memcpy(vmd->frame_table[i].frame_record, current_frame_record, + BYTES_PER_FRAME_RECORD); + +if (current_frame_record[0] == 0x02) { + /* assume 15 fps for now */ + vmd->frame_table[i].pts = video_frame_count++; + vmd->frame_table[i].pts *= 90000; + vmd->frame_table[i].pts /= 15; +} + + current_frame_record += BYTES_PER_FRAME_RECORD; + i++; + } + + av_free(raw_frame_table); + + /* set the pts reference at 1 pts = 1/90000 sec */ + s->pts_num = 1; + s->pts_den = 90000; + + vmd->current_frame = 0; + + return 0; +} + +static int vmd_read_packet(AVFormatContext *s, + AVPacket *pkt) +{ + VmdDemuxContext *vmd = (VmdDemuxContext *)s->priv_data; + ByteIOContext *pb = &s->pb; + int ret = 0; + vmd_frame_t *frame; + + if (vmd->current_frame >= vmd->frame_count) + return -EIO; + + frame = &vmd->frame_table[vmd->current_frame]; + /* position the stream (will probably be there already) */ + url_fseek(pb, frame->frame_offset, SEEK_SET); + + if (av_new_packet(pkt, frame->frame_size + BYTES_PER_FRAME_RECORD)) + return AVERROR_NOMEM; + memcpy(pkt->data, frame->frame_record, BYTES_PER_FRAME_RECORD); + ret = get_buffer(pb, pkt->data + BYTES_PER_FRAME_RECORD, + frame->frame_size); + + if (ret != frame->frame_size) + ret = -EIO; + pkt->stream_index = frame->stream_index; + pkt->pts = frame->pts; + + vmd->current_frame++; + + return ret; +} + +static int vmd_read_close(AVFormatContext *s) +{ + VmdDemuxContext *vmd = (VmdDemuxContext *)s->priv_data; + + av_free(vmd->frame_table); + + return 0; +} + +static AVInputFormat vmd_iformat = { + "vmd", + "Sierra VMD format", + sizeof(VmdDemuxContext), + vmd_probe, + vmd_read_header, + vmd_read_packet, + vmd_read_close, +}; + +int vmd_init(void) +{ + av_register_input_format(&vmd_iformat); + return 0; +}