* Sierra VMD Format Demuxer
* Copyright (c) 2004 The ffmpeg Project
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file sierravmd.c
+ * @file
* 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/channel_layout.h"
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
+#include "internal.h"
#define VMD_HEADER_SIZE 0x0330
#define BYTES_PER_FRAME_RECORD 16
-typedef struct {
+typedef struct vmd_frame {
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;
unsigned int frame_count;
unsigned int frames_per_block;
- vmd_frame_t *frame_table;
+ vmd_frame *frame_table;
unsigned int current_frame;
+ int is_indeo3;
int sample_rate;
int64_t audio_sample_counter;
static int vmd_probe(AVProbeData *p)
{
+ int w, h;
+ if (p->buf_size < 16)
+ return 0;
/* check if the first 2 bytes of the file contain the appropriate size
* of a VMD header chunk */
if (AV_RL16(&p->buf[0]) != VMD_HEADER_SIZE - 2)
return 0;
+ w = AV_RL16(&p->buf[12]);
+ h = AV_RL16(&p->buf[14]);
+ if (!w || w > 2048 || !h || h > 2048)
+ return 0;
/* only return half certainty since this check is a bit sketchy */
- return AVPROBE_SCORE_MAX / 2;
+ return AVPROBE_SCORE_EXTENSION;
}
-static int vmd_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int vmd_read_header(AVFormatContext *s)
{
VmdDemuxContext *vmd = s->priv_data;
- ByteIOContext *pb = &s->pb;
- AVStream *st, *vst;
+ AVIOContext *pb = s->pb;
+ AVStream *st = NULL, *vst;
unsigned int toc_offset;
unsigned char *raw_frame_table;
int raw_frame_table_size;
- offset_t current_offset;
- int i, j;
+ int64_t current_offset;
+ int i, j, ret;
unsigned int total_frames;
- int64_t pts_inc = 1;
- int64_t current_video_pts = 0, current_audio_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;
-
+ avio_seek(pb, 0, SEEK_SET);
+ if (avio_read(pb, vmd->vmd_header, VMD_HEADER_SIZE) != VMD_HEADER_SIZE)
+ return AVERROR(EIO);
+
+ if(vmd->vmd_header[24] == 'i' && vmd->vmd_header[25] == 'v' && vmd->vmd_header[26] == '3')
+ vmd->is_indeo3 = 1;
+ else
+ vmd->is_indeo3 = 0;
/* start up the decoders */
- vst = av_new_stream(s, 0);
+ vst = avformat_new_stream(s, NULL);
if (!vst)
- return AVERROR_NOMEM;
- av_set_pts_info(vst, 33, 1, 10);
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(vst, 33, 1, 10);
vmd->video_stream_index = vst->index;
- vst->codec->codec_type = CODEC_TYPE_VIDEO;
- vst->codec->codec_id = 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]);
- 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);
+ vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+ vst->codecpar->codec_id = vmd->is_indeo3 ? AV_CODEC_ID_INDEO3 : AV_CODEC_ID_VMDVIDEO;
+ vst->codecpar->codec_tag = 0; /* no fourcc */
+ vst->codecpar->width = AV_RL16(&vmd->vmd_header[12]);
+ vst->codecpar->height = AV_RL16(&vmd->vmd_header[14]);
+ if(vmd->is_indeo3 && vst->codecpar->width > 320){
+ vst->codecpar->width >>= 1;
+ vst->codecpar->height >>= 1;
+ }
+ vst->codecpar->extradata_size = VMD_HEADER_SIZE;
+ vst->codecpar->extradata = av_mallocz(VMD_HEADER_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
+ memcpy(vst->codecpar->extradata, vmd->vmd_header, VMD_HEADER_SIZE);
/* if sample rate is 0, assume no audio */
vmd->sample_rate = AV_RL16(&vmd->vmd_header[804]);
if (vmd->sample_rate) {
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
- return AVERROR_NOMEM;
+ 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 fourcc */
- st->codec->channels = (vmd->vmd_header[811] & 0x80) ? 2 : 1;
- st->codec->sample_rate = vmd->sample_rate;
- st->codec->block_align = AV_RL16(&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);
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_id = AV_CODEC_ID_VMDAUDIO;
+ st->codecpar->codec_tag = 0; /* no fourcc */
+ if (vmd->vmd_header[811] & 0x80) {
+ st->codecpar->channels = 2;
+ st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
} else {
- st->codec->bits_per_sample = 8;
+ st->codecpar->channels = 1;
+ st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
}
- st->codec->bit_rate = st->codec->sample_rate *
- st->codec->bits_per_sample * st->codec->channels;
+ st->codecpar->sample_rate = vmd->sample_rate;
+ st->codecpar->block_align = AV_RL16(&vmd->vmd_header[806]);
+ if (st->codecpar->block_align & 0x8000) {
+ st->codecpar->bits_per_coded_sample = 16;
+ st->codecpar->block_align = -(st->codecpar->block_align - 0x10000);
+ } else {
+ st->codecpar->bits_per_coded_sample = 8;
+ }
+ st->codecpar->bit_rate = st->codecpar->sample_rate *
+ st->codecpar->bits_per_coded_sample * st->codecpar->channels;
/* calculate pts */
- num = st->codec->block_align;
- den = st->codec->sample_rate * st->codec->channels;
+ num = st->codecpar->block_align;
+ den = st->codecpar->sample_rate * st->codecpar->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);
- pts_inc = num;
+ avpriv_set_pts_info(vst, 33, num, den);
+ avpriv_set_pts_info(st, 33, num, den);
}
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);
+ avio_seek(pb, toc_offset, SEEK_SET);
raw_frame_table = NULL;
vmd->frame_table = NULL;
sound_buffers = AV_RL16(&vmd->vmd_header[808]);
raw_frame_table_size = vmd->frame_count * 6;
- raw_frame_table = av_malloc(raw_frame_table_size);
- if(vmd->frame_count * vmd->frames_per_block >= UINT_MAX / sizeof(vmd_frame_t)){
+ if(vmd->frame_count * vmd->frames_per_block >= UINT_MAX / sizeof(vmd_frame) - sound_buffers){
av_log(s, AV_LOG_ERROR, "vmd->frame_count * vmd->frames_per_block too large\n");
return -1;
}
- vmd->frame_table = av_malloc((vmd->frame_count * vmd->frames_per_block + sound_buffers) * sizeof(vmd_frame_t));
+ raw_frame_table = av_malloc(raw_frame_table_size);
+ 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;
+ ret = AVERROR(ENOMEM);
+ goto error;
}
- if (get_buffer(pb, raw_frame_table, raw_frame_table_size) !=
+ if (avio_read(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;
+ ret = AVERROR(EIO);
+ goto error;
}
total_frames = 0;
int type;
uint32_t size;
- get_buffer(pb, chunk, BYTES_PER_FRAME_RECORD);
+ avio_read(pb, chunk, BYTES_PER_FRAME_RECORD);
type = chunk[0];
size = AV_RL32(&chunk[2]);
- if(!size)
+ if (size > INT_MAX / 2) {
+ av_log(s, AV_LOG_ERROR, "Invalid frame size\n");
+ ret = AVERROR_INVALIDDATA;
+ goto error;
+ }
+ if(!size && type != 1)
continue;
switch(type) {
case 1: /* Audio Chunk */
+ if (!st) break;
/* first audio chunk contains several audio buffers */
- if(current_audio_pts){
- 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++;
- current_audio_pts += pts_inc;
- }else{
- uint32_t flags;
- int k;
- int noff;
- int64_t pos;
-
- pos = url_ftell(pb);
- url_fseek(pb, current_offset, SEEK_SET);
- flags = get_le32(pb);
- noff = 4;
- url_fseek(pb, pos, SEEK_SET);
- av_log(s, AV_LOG_DEBUG, "Sound mapping = %08X (%i bufs)\n", flags, sound_buffers);
- for(k = 0; k < sound_buffers - 1; k++){
- if(flags & 1) { /* silent block */
- vmd->frame_table[total_frames].frame_size = 0;
- }else{
- vmd->frame_table[total_frames].frame_size = st->codec->block_align + (st->codec->block_align & 1);
- }
- noff += vmd->frame_table[total_frames].frame_size;
- vmd->frame_table[total_frames].frame_offset = current_offset + noff;
- vmd->frame_table[total_frames].stream_index = vmd->audio_stream_index;
- memcpy(vmd->frame_table[total_frames].frame_record, chunk, BYTES_PER_FRAME_RECORD);
- vmd->frame_table[total_frames].pts = current_audio_pts;
- total_frames++;
- current_audio_pts += pts_inc;
- flags >>= 1;
- }
- }
+ 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 - 1;
+ 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 = current_video_pts;
+ vmd->frame_table[total_frames].pts = i;
total_frames++;
break;
}
current_offset += size;
}
- current_video_pts += pts_inc;
}
av_free(raw_frame_table);
vmd->frame_count = total_frames;
return 0;
+
+error:
+ av_free(raw_frame_table);
+ av_free(vmd->frame_table);
+ return ret;
}
static int vmd_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
VmdDemuxContext *vmd = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ AVIOContext *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);
+ avio_seek(pb, frame->frame_offset, SEEK_SET);
if (av_new_packet(pkt, frame->frame_size + BYTES_PER_FRAME_RECORD))
- return AVERROR_NOMEM;
- pkt->pos= url_ftell(pb);
+ return AVERROR(ENOMEM);
+ pkt->pos= avio_tell(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 && frame->frame_record[0] == 0x02)
+ ret = avio_read(pb, pkt->data, frame->frame_size);
+ else
+ ret = avio_read(pb, pkt->data + BYTES_PER_FRAME_RECORD,
+ frame->frame_size);
if (ret != frame->frame_size) {
- av_free_packet(pkt);
- ret = AVERROR_IO;
+ av_packet_unref(pkt);
+ ret = AVERROR(EIO);
}
pkt->stream_index = frame->stream_index;
pkt->pts = frame->pts;
- av_log(NULL, AV_LOG_INFO, " dispatching %s frame with %d bytes and pts %"PRId64"\n",
+ 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);
return 0;
}
-AVInputFormat vmd_demuxer = {
- "vmd",
- "Sierra VMD format",
- sizeof(VmdDemuxContext),
- vmd_probe,
- vmd_read_header,
- vmd_read_packet,
- vmd_read_close,
+AVInputFormat ff_vmd_demuxer = {
+ .name = "vmd",
+ .long_name = NULL_IF_CONFIG_SMALL("Sierra VMD"),
+ .priv_data_size = sizeof(VmdDemuxContext),
+ .read_probe = vmd_probe,
+ .read_header = vmd_read_header,
+ .read_packet = vmd_read_packet,
+ .read_close = vmd_read_close,
};
projects / ffmpeg / blobdiff