* Sierra VMD Format Demuxer
* Copyright (c) 2004 The ffmpeg Project
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file sierravmd.c
+ * @file libavformat/sierravmd.c
* Sierra VMD file demuxer
* by Vladimir "VAG" Gneushev (vagsoft at mail.ru)
* for more information on the Sierra VMD file format, visit:
* http://www.pcisys.net/~melanson/codecs/
*/
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
#define VMD_HEADER_SIZE 0x0330
typedef struct {
int stream_index;
- offset_t frame_offset;
+ int64_t frame_offset;
unsigned int frame_size;
int64_t pts;
int keyframe;
unsigned char frame_record[BYTES_PER_FRAME_RECORD];
-} vmd_frame_t;
+} vmd_frame;
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 frames_per_block;
+ vmd_frame *frame_table;
unsigned int current_frame;
+ int is_indeo3;
int sample_rate;
int64_t audio_sample_counter;
- int audio_frame_divisor;
- int audio_block_align;
+ int skiphdr;
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)
+ if (AV_RL16(&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;
}
-/* This is a support function to determine the duration, in sample
- * frames, of a particular audio chunk, taking into account silent
- * encodings. */
-static int vmd_calculate_audio_duration(unsigned char *audio_chunk,
- int audio_chunk_size, int block_align)
-{
- unsigned char *p = audio_chunk + 16;
- unsigned char *p_end = audio_chunk + audio_chunk_size;
- int total_samples = 0;
- unsigned int sound_flags;
-
- if (audio_chunk_size < 16)
- return 0;
-
- sound_flags = LE_32(p);
- p += 4;
- while (p < p_end) {
- total_samples += block_align;
- if ((sound_flags & 0x01) == 0)
- p += block_align;
- sound_flags >>= 1;
- }
-
- return total_samples;
-}
-
static int vmd_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
- VmdDemuxContext *vmd = (VmdDemuxContext *)s->priv_data;
- ByteIOContext *pb = &s->pb;
- AVStream *st;
+ VmdDemuxContext *vmd = s->priv_data;
+ ByteIOContext *pb = s->pb;
+ AVStream *st = NULL, *vst;
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;
+ int64_t current_offset;
+ int i, j;
unsigned int total_frames;
- int64_t video_pts_inc;
- int64_t current_video_pts = 0;
+ int64_t current_audio_pts = 0;
+ unsigned char chunk[BYTES_PER_FRAME_RECORD];
+ int num, den;
+ int sound_buffers;
/* 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 AVERROR_IO;
-
- vmd->audio_sample_counter = 0;
- vmd->audio_frame_divisor = 1;
- vmd->audio_block_align = 1;
+ return AVERROR(EIO);
+ if(vmd->vmd_header[16] == 'i' && vmd->vmd_header[17] == 'v' && vmd->vmd_header[18] == '3')
+ vmd->is_indeo3 = 1;
+ else
+ vmd->is_indeo3 = 0;
/* start up the decoders */
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR_NOMEM;
- av_set_pts_info(st, 33, 1, 90000);
- 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_mallocz(VMD_HEADER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
- memcpy(st->codec->extradata, vmd->vmd_header, VMD_HEADER_SIZE);
+ vst = av_new_stream(s, 0);
+ if (!vst)
+ return AVERROR(ENOMEM);
+ av_set_pts_info(vst, 33, 1, 10);
+ vmd->video_stream_index = vst->index;
+ vst->codec->codec_type = CODEC_TYPE_VIDEO;
+ vst->codec->codec_id = vmd->is_indeo3 ? CODEC_ID_INDEO3 : CODEC_ID_VMDVIDEO;
+ vst->codec->codec_tag = 0; /* no fourcc */
+ vst->codec->width = AV_RL16(&vmd->vmd_header[12]);
+ vst->codec->height = AV_RL16(&vmd->vmd_header[14]);
+ if(vmd->is_indeo3 && vst->codec->width > 320){
+ vst->codec->width >>= 1;
+ vst->codec->height >>= 1;
+ }
+ vst->codec->extradata_size = VMD_HEADER_SIZE;
+ vst->codec->extradata = av_mallocz(VMD_HEADER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
+ memcpy(vst->codec->extradata, vmd->vmd_header, VMD_HEADER_SIZE);
/* if sample rate is 0, assume no audio */
- vmd->sample_rate = LE_16(&vmd->vmd_header[804]);
+ vmd->sample_rate = AV_RL16(&vmd->vmd_header[804]);
if (vmd->sample_rate) {
st = av_new_stream(s, 0);
if (!st)
- return AVERROR_NOMEM;
- av_set_pts_info(st, 33, 1, 90000);
+ return AVERROR(ENOMEM);
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->codec_tag = 0; /* no fourcc */
st->codec->channels = (vmd->vmd_header[811] & 0x80) ? 2 : 1;
st->codec->sample_rate = vmd->sample_rate;
- st->codec->block_align = vmd->audio_block_align =
- LE_16(&vmd->vmd_header[806]);
+ st->codec->block_align = AV_RL16(&vmd->vmd_header[806]);
if (st->codec->block_align & 0x8000) {
- st->codec->bits_per_sample = 16;
+ st->codec->bits_per_coded_sample = 16;
st->codec->block_align = -(st->codec->block_align - 0x10000);
- } else
- st->codec->bits_per_sample = 16;
-// st->codec->bits_per_sample = 8;
+ } else {
+ st->codec->bits_per_coded_sample = 8;
+ }
st->codec->bit_rate = st->codec->sample_rate *
- st->codec->bits_per_sample * st->codec->channels;
-
- /* for calculating pts */
- vmd->audio_frame_divisor = st->codec->bits_per_sample / 8 /
- st->codec->channels;
-
- video_pts_inc = 90000;
- video_pts_inc *= st->codec->block_align;
- video_pts_inc /= st->codec->sample_rate;
- } else {
- /* if no audio, assume 10 frames/second */
- video_pts_inc = 90000 / 10;
+ st->codec->bits_per_coded_sample * st->codec->channels;
+
+ /* calculate pts */
+ num = st->codec->block_align;
+ den = st->codec->sample_rate * st->codec->channels;
+ av_reduce(&den, &num, den, num, (1UL<<31)-1);
+ av_set_pts_info(vst, 33, num, den);
+ av_set_pts_info(st, 33, num, den);
}
- /* 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 */
- if(vmd->sample_rate)
- vmd->frame_count *= 2;
+ toc_offset = AV_RL32(&vmd->vmd_header[812]);
+ vmd->frame_count = AV_RL16(&vmd->vmd_header[6]);
+ vmd->frames_per_block = AV_RL16(&vmd->vmd_header[18]);
+ url_fseek(pb, toc_offset, SEEK_SET);
+
raw_frame_table = NULL;
vmd->frame_table = NULL;
- raw_frame_table_size = vmd->frame_count * BYTES_PER_FRAME_RECORD;
+ sound_buffers = AV_RL16(&vmd->vmd_header[808]);
+ raw_frame_table_size = vmd->frame_count * 6;
+ if(vmd->frame_count * vmd->frames_per_block >= UINT_MAX / sizeof(vmd_frame)){
+ av_log(s, AV_LOG_ERROR, "vmd->frame_count * vmd->frames_per_block too large\n");
+ return -1;
+ }
raw_frame_table = av_malloc(raw_frame_table_size);
- vmd->frame_table = av_malloc(vmd->frame_count * sizeof(vmd_frame_t));
+ vmd->frame_table = av_malloc((vmd->frame_count * vmd->frames_per_block + sound_buffers) * sizeof(vmd_frame));
if (!raw_frame_table || !vmd->frame_table) {
av_free(raw_frame_table);
av_free(vmd->frame_table);
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
}
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 AVERROR_IO;
+ return AVERROR(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 */
- // note, we limit the size to 1Gb to ensure that we dont end up overflowing the size integer used to allocate the memory
- vmd->frame_table[i].frame_size = LE_32(¤t_frame_record[2]) & 0x3FFFFFFF;
-
- /* 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;
+ total_frames = 0;
+ for (i = 0; i < vmd->frame_count; i++) {
+
+ current_offset = AV_RL32(&raw_frame_table[6 * i + 2]);
+
+ /* handle each entry in index block */
+ for (j = 0; j < vmd->frames_per_block; j++) {
+ int type;
+ uint32_t size;
+
+ get_buffer(pb, chunk, BYTES_PER_FRAME_RECORD);
+ type = chunk[0];
+ size = AV_RL32(&chunk[2]);
+ if(!size && type != 1)
+ continue;
+ switch(type) {
+ case 1: /* Audio Chunk */
+ if (!st) break;
+ /* first audio chunk contains several audio buffers */
+ vmd->frame_table[total_frames].frame_offset = current_offset;
+ vmd->frame_table[total_frames].stream_index = vmd->audio_stream_index;
+ vmd->frame_table[total_frames].frame_size = size;
+ memcpy(vmd->frame_table[total_frames].frame_record, chunk, BYTES_PER_FRAME_RECORD);
+ vmd->frame_table[total_frames].pts = current_audio_pts;
+ total_frames++;
+ if(!current_audio_pts)
+ current_audio_pts += sound_buffers;
+ else
+ current_audio_pts++;
+ break;
+ case 2: /* Video Chunk */
+ vmd->frame_table[total_frames].frame_offset = current_offset;
+ vmd->frame_table[total_frames].stream_index = vmd->video_stream_index;
+ vmd->frame_table[total_frames].frame_size = size;
+ memcpy(vmd->frame_table[total_frames].frame_record, chunk, BYTES_PER_FRAME_RECORD);
+ vmd->frame_table[total_frames].pts = i;
+ total_frames++;
+ break;
+ }
+ current_offset += size;
}
-
- 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);
-
- /* figure out the pts for this frame */
- if (current_frame_record[0] == 0x02) {
- vmd->frame_table[i].pts = current_video_pts;
- current_video_pts += video_pts_inc;
- } else if (current_frame_record[0] == 0x01) {
- /* figure out the pts during the dispatch phase */
- vmd->frame_table[i].pts = 0;
- }
-
- current_frame_record += BYTES_PER_FRAME_RECORD;
- i++;
}
av_free(raw_frame_table);
vmd->current_frame = 0;
+ vmd->frame_count = total_frames;
return 0;
}
static int vmd_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
- VmdDemuxContext *vmd = (VmdDemuxContext *)s->priv_data;
- ByteIOContext *pb = &s->pb;
+ VmdDemuxContext *vmd = s->priv_data;
+ ByteIOContext *pb = s->pb;
int ret = 0;
- vmd_frame_t *frame;
+ vmd_frame *frame;
if (vmd->current_frame >= vmd->frame_count)
- return AVERROR_IO;
+ return AVERROR(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;
+ return AVERROR(ENOMEM);
pkt->pos= url_ftell(pb);
memcpy(pkt->data, frame->frame_record, BYTES_PER_FRAME_RECORD);
- ret = get_buffer(pb, pkt->data + BYTES_PER_FRAME_RECORD,
- frame->frame_size);
+ if(vmd->is_indeo3)
+ ret = get_buffer(pb, pkt->data, frame->frame_size);
+ else
+ ret = get_buffer(pb, pkt->data + BYTES_PER_FRAME_RECORD,
+ frame->frame_size);
if (ret != frame->frame_size) {
av_free_packet(pkt);
- ret = AVERROR_IO;
+ ret = AVERROR(EIO);
}
pkt->stream_index = frame->stream_index;
- if (frame->frame_record[0] == 0x02)
- pkt->pts = frame->pts;
- else {
- pkt->pts = vmd->audio_sample_counter;
- pkt->pts *= 90000;
- pkt->pts /= vmd->sample_rate;
-// pkt->pts /= vmd->audio_frame_divisor;
- vmd->audio_sample_counter += vmd_calculate_audio_duration(
- pkt->data, pkt->size, vmd->audio_block_align);
-
- }
-av_log(NULL, AV_LOG_INFO, " dispatching %s frame with %d bytes and pts %"PRId64" (%0.1f sec)\n",
- (frame->frame_record[0] == 0x02) ? "video" : "audio",
- frame->frame_size + BYTES_PER_FRAME_RECORD,
- pkt->pts, (float)(pkt->pts / 90000.0));
+ pkt->pts = frame->pts;
+ av_log(s, AV_LOG_DEBUG, " dispatching %s frame with %d bytes and pts %"PRId64"\n",
+ (frame->frame_record[0] == 0x02) ? "video" : "audio",
+ frame->frame_size + BYTES_PER_FRAME_RECORD,
+ pkt->pts);
vmd->current_frame++;
static int vmd_read_close(AVFormatContext *s)
{
- VmdDemuxContext *vmd = (VmdDemuxContext *)s->priv_data;
+ VmdDemuxContext *vmd = s->priv_data;
av_free(vmd->frame_table);
return 0;
}
-static AVInputFormat vmd_iformat = {
+AVInputFormat vmd_demuxer = {
"vmd",
- "Sierra VMD format",
+ NULL_IF_CONFIG_SMALL("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;
-}
projects / frescor / ffmpeg.git / blobdiff