/*
* AVI demuxer
- * Copyright (c) 2001 Fabrice Bellard.
+ * Copyright (c) 2001 Fabrice Bellard
*
* This file is part of FFmpeg.
*
int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
int prefix_count;
+ uint32_t pal[256];
+ int has_pal;
} AVIStream;
typedef struct {
DVDemuxContext* dv_demux;
} AVIContext;
+static const char avi_headers[][8] = {
+ { 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' },
+ { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
+ { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19},
+ { 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' },
+ { 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' },
+ { 0 }
+};
+
static int avi_load_index(AVFormatContext *s);
static int guess_ni_flag(AVFormatContext *s);
static int get_riff(AVIContext *avi, ByteIOContext *pb)
{
- uint32_t tag;
- /* check RIFF header */
- tag = get_le32(pb);
+ char header[8];
+ int i;
- if (tag != MKTAG('R', 'I', 'F', 'F'))
- return -1;
+ /* check RIFF header */
+ get_buffer(pb, header, 4);
avi->riff_end = get_le32(pb); /* RIFF chunk size */
avi->riff_end += url_ftell(pb); /* RIFF chunk end */
- tag = get_le32(pb);
- if(tag == MKTAG('A', 'V', 'I', 0x19))
- av_log(NULL, AV_LOG_INFO, "file has been generated with a totally broken muxer\n");
- else
- if (tag != MKTAG('A', 'V', 'I', ' ') && tag != MKTAG('A', 'V', 'I', 'X'))
+ get_buffer(pb, header+4, 4);
+
+ for(i=0; avi_headers[i][0]; i++)
+ if(!memcmp(header, avi_headers[i], 8))
+ break;
+ if(!avi_headers[i][0])
return -1;
+ if(header[7] == 0x19)
+ av_log(NULL, AV_LOG_INFO, "This file has been generated by a totally broken muxer.\n");
+
return 0;
}
static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
int longs_pre_entry= get_le16(pb);
int index_sub_type = get_byte(pb);
int index_type = get_byte(pb);
AVIStream *ast;
int i;
int64_t last_pos= -1;
- int64_t filesize= url_fsize(&s->pb);
+ int64_t filesize= url_fsize(s->pb);
#ifdef DEBUG_SEEK
av_log(s, AV_LOG_ERROR, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64"\n",
static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
uint32_t tag, tag1, handler;
int codec_type, stream_index, frame_period, bit_rate;
unsigned int size, nb_frames;
AVStream *st;
AVIStream *ast = NULL;
char str_track[4];
+ int avih_width=0, avih_height=0;
+ int amv_file_format=0;
avi->stream_index= -1;
switch(tag) {
case MKTAG('L', 'I', 'S', 'T'):
- /* ignored, except when start of video packets */
+ /* Ignored, except at start of video packets. */
tag1 = get_le32(pb);
#ifdef DEBUG
print_tag("list", tag1, 0);
avi->is_odml = 1;
url_fskip(pb, size + (size & 1));
break;
+ case MKTAG('a', 'm', 'v', 'h'):
+ amv_file_format=1;
case MKTAG('a', 'v', 'i', 'h'):
- /* avi header */
+ /* AVI header */
/* using frame_period is bad idea */
frame_period = get_le32(pb);
bit_rate = get_le32(pb) * 8;
url_fskip(pb, 2 * 4);
get_le32(pb);
+ get_le32(pb);
+ avih_width=get_le32(pb);
+ avih_height=get_le32(pb);
- url_fskip(pb, size - 7 * 4);
+ url_fskip(pb, size - 10 * 4);
break;
case MKTAG('s', 't', 'r', 'h'):
/* stream header */
goto fail;
st->priv_data = ast;
}
+ if(amv_file_format)
+ tag1 = stream_index ? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
#ifdef DEBUG
print_tag("strh", tag1, -1);
/*
* After some consideration -- I don't think we
- * have to support anything but DV in a type1 AVIs.
+ * have to support anything but DV in type1 AVIs.
*/
if (s->nb_streams != 1)
goto fail;
}
/*
* else, leave duration alone; timing estimation in utils.c
- * will make a guess based on bit rate.
+ * will make a guess based on bitrate.
*/
stream_index = s->nb_streams - 1;
get_le32(pb); /* initial frame */
ast->scale = get_le32(pb);
ast->rate = get_le32(pb);
- if(ast->scale && ast->rate){
- }else if(frame_period){
- ast->rate = 1000000;
- ast->scale = frame_period;
- }else{
- ast->rate = 25;
- ast->scale = 1;
+ if(!(ast->scale && ast->rate)){
+ av_log(s, AV_LOG_WARNING, "scale/rate is %u/%u which is invalid. (This file has been generated by broken software.)\n", ast->scale, ast->rate);
+ if(frame_period){
+ ast->rate = 1000000;
+ ast->scale = frame_period;
+ }else{
+ ast->rate = 25;
+ ast->scale = 1;
+ }
}
av_set_pts_info(st, 64, ast->scale, ast->rate);
//FIXME
codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
break;
+ case MKTAG('d', 'a', 't', 's'):
+ codec_type = CODEC_TYPE_DATA;
+ break;
default:
av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
goto fail;
st = s->streams[stream_index];
switch(codec_type) {
case CODEC_TYPE_VIDEO:
+ if(amv_file_format){
+ st->codec->width=avih_width;
+ st->codec->height=avih_height;
+ st->codec->codec_type = CODEC_TYPE_VIDEO;
+ st->codec->codec_id = CODEC_ID_AMV;
+ url_fskip(pb, size);
+ break;
+ }
get_le32(pb); /* size */
st->codec->width = get_le32(pb);
st->codec->height = get_le32(pb);
get_le16(pb); /* panes */
- st->codec->bits_per_sample= get_le16(pb); /* depth */
+ st->codec->bits_per_coded_sample= get_le16(pb); /* depth */
tag1 = get_le32(pb);
get_le32(pb); /* ImageSize */
get_le32(pb); /* XPelsPerMeter */
if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
get_byte(pb);
- /* Extract palette from extradata if bpp <= 8 */
- /* This code assumes that extradata contains only palette */
- /* This is true for all paletted codecs implemented in ffmpeg */
- if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
+ /* Extract palette from extradata if bpp <= 8. */
+ /* This code assumes that extradata contains only palette. */
+ /* This is true for all paletted codecs implemented in FFmpeg. */
+ if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
#ifdef WORDS_BIGENDIAN
for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_tag = tag1;
st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
- st->need_parsing = AVSTREAM_PARSE_HEADERS; // this is needed to get the pict type which is needed for generating correct pts
+ st->need_parsing = AVSTREAM_PARSE_HEADERS; // This is needed to get the pict type which is necessary for generating correct pts.
// url_fskip(pb, size - 5 * 4);
break;
case CODEC_TYPE_AUDIO:
get_wav_header(pb, st->codec, size);
- if(ast->sample_size && st->codec->block_align && ast->sample_size % st->codec->block_align)
- av_log(s, AV_LOG_DEBUG, "invalid sample size or block align detected\n");
+ if(ast->sample_size && st->codec->block_align && ast->sample_size != st->codec->block_align){
+ av_log(s, AV_LOG_WARNING, "sample size (%d) != block align (%d)\n", ast->sample_size, st->codec->block_align);
+ ast->sample_size= st->codec->block_align;
+ }
if (size%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
url_fskip(pb, 1);
/* Force parsing as several audio frames can be in
- * one packet and timestamps refer to packet start*/
+ * one packet and timestamps refer to packet start. */
st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
- /* ADTS header is in extradata, AAC without header must be stored as exact frames, parser not needed and it will fail */
+ /* ADTS header is in extradata, AAC without header must be
+ * stored as exact frames. Parser not needed and it will
+ * fail. */
if (st->codec->codec_id == CODEC_ID_AAC && st->codec->extradata_size)
st->need_parsing = AVSTREAM_PARSE_NONE;
/* AVI files with Xan DPCM audio (wrongly) declare PCM
st->codec->codec_id = CODEC_ID_XAN_DPCM;
st->codec->codec_tag = 0;
}
+ if (amv_file_format)
+ st->codec->codec_id = CODEC_ID_ADPCM_IMA_AMV;
break;
default:
st->codec->codec_type = CODEC_TYPE_DATA;
}
url_fseek(pb, i+size, SEEK_SET);
break;
+ case MKTAG('v', 'p', 'r', 'p'):
+ if(stream_index < (unsigned)s->nb_streams && size > 9*4){
+ AVRational active, active_aspect;
+
+ st = s->streams[stream_index];
+ get_le32(pb);
+ get_le32(pb);
+ get_le32(pb);
+ get_le32(pb);
+ get_le32(pb);
+
+ active_aspect.den= get_le16(pb);
+ active_aspect.num= get_le16(pb);
+ active.num = get_le32(pb);
+ active.den = get_le32(pb);
+ get_le32(pb); //nbFieldsPerFrame
+
+ if(active_aspect.num && active_aspect.den && active.num && active.den){
+ st->sample_aspect_ratio= av_div_q(active_aspect, active);
+//av_log(s, AV_LOG_ERROR, "vprp %d/%d %d/%d\n", active_aspect.num, active_aspect.den, active.num, active.den);
+ }
+ size -= 9*4;
+ }
+ url_fseek(pb, size, SEEK_CUR);
+ break;
case MKTAG('I', 'N', 'A', 'M'):
avi_read_tag(pb, s->title, sizeof(s->title), size);
break;
break;
default:
if(size > 1000000){
- av_log(s, AV_LOG_ERROR, "well something went wrong during header parsing, "
- "ill ignore it and try to continue anyway\n");
+ av_log(s, AV_LOG_ERROR, "Something went wrong during header parsing, "
+ "I will ignore it and try to continue anyway.\n");
avi->movi_list = url_ftell(pb) - 4;
avi->movi_end = url_fsize(pb);
goto end_of_header;
/* check stream number */
if (stream_index != s->nb_streams - 1) {
fail:
- for(i=0;i<s->nb_streams;i++) {
- av_freep(&s->streams[i]->codec->extradata);
- av_freep(&s->streams[i]);
- }
return -1;
}
avi_load_index(s);
avi->index_loaded = 1;
avi->non_interleaved |= guess_ni_flag(s);
- if(avi->non_interleaved)
+ if(avi->non_interleaved) {
+ av_log(s, AV_LOG_INFO, "non-interleaved AVI\n");
clean_index(s);
+ }
return 0;
}
static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
int n, d[8], size;
offset_t i, sync;
void* dstr;
ts= av_rescale(ts, AV_TIME_BASE * (int64_t)st->time_base.num, st->time_base.den);
// av_log(NULL, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
- if(ts < best_ts){
+ if(ts < best_ts && st->nb_index_entries){
best_ts= ts;
best_st= st;
best_stream_index= i;
}
}
+ if(!best_st)
+ return -1;
+
best_ast = best_st->priv_data;
best_ts= av_rescale(best_ts, best_st->time_base.den, AV_TIME_BASE * (int64_t)best_st->time_base.num); //FIXME a little ugly
if(best_ast->remaining)
if(i>=0){
int64_t pos= best_st->index_entries[i].pos;
pos += best_ast->packet_size - best_ast->remaining;
- url_fseek(&s->pb, pos + 8, SEEK_SET);
+ url_fseek(s->pb, pos + 8, SEEK_SET);
// av_log(NULL, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
assert(best_ast->remaining <= best_ast->packet_size);
size= ast->remaining;
av_get_packet(pb, pkt, size);
+ if(ast->has_pal && pkt->data && pkt->size<(unsigned)INT_MAX/2){
+ ast->has_pal=0;
+ pkt->size += 4*256;
+ pkt->data = av_realloc(pkt->data, pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if(pkt->data)
+ memcpy(pkt->data + pkt->size - 4*256, ast->pal, 4*256);
+ }
+
if (ENABLE_DV_DEMUXER && avi->dv_demux) {
dstr = pkt->destruct;
size = dv_produce_packet(avi->dv_demux, pkt,
pkt->destruct = dstr;
pkt->flags |= PKT_FLAG_KEY;
} else {
- /* XXX: how to handle B frames in avi ? */
+ /* XXX: How to handle B-frames in AVI? */
pkt->dts = ast->frame_offset;
// pkt->dts += ast->start;
if(ast->sample_size)
&& d[1] >= '0' && d[1] <= '9'){
n= (d[0] - '0') * 10 + (d[1] - '0');
}else{
- n= 100; //invalid stream id
+ n= 100; //invalid stream ID
}
//parse ##dc/##wb
if(n < s->nb_streams){
- AVStream *st;
- AVIStream *ast;
- st = s->streams[n];
- ast = st->priv_data;
-
- if( (st->discard >= AVDISCARD_DEFAULT && size==0)
- /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
- || st->discard >= AVDISCARD_ALL){
+ AVStream *st;
+ AVIStream *ast;
+ st = s->streams[n];
+ ast = st->priv_data;
+
+ if(s->nb_streams>=2){
+ AVStream *st1 = s->streams[1];
+ AVIStream *ast1= st1->priv_data;
+ //workaround for broken small-file-bug402.avi
+ if( d[2] == 'w' && d[3] == 'b'
+ && n==0
+ && st ->codec->codec_type == CODEC_TYPE_VIDEO
+ && st1->codec->codec_type == CODEC_TYPE_AUDIO
+ && ast->prefix == 'd'*256+'c'
+ && (d[2]*256+d[3] == ast1->prefix || !ast1->prefix_count)
+ ){
+ n=1;
+ st = st1;
+ ast = ast1;
+ av_log(s, AV_LOG_WARNING, "Invalid stream + prefix combination, assuming audio.\n");
+ }
+ }
+
+
+ if( (st->discard >= AVDISCARD_DEFAULT && size==0)
+ /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
+ || st->discard >= AVDISCARD_ALL){
if(ast->sample_size) ast->frame_offset += pkt->size;
else ast->frame_offset++;
url_fskip(pb, size);
goto resync;
- }
+ }
- if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
- d[2]*256+d[3] == ast->prefix /*||
- (d[2] == 'd' && d[3] == 'c') ||
- (d[2] == 'w' && d[3] == 'b')*/) {
+ if (d[2] == 'p' && d[3] == 'c' && size<=4*256+4) {
+ int k = get_byte(pb);
+ int last = (k + get_byte(pb) - 1) & 0xFF;
-//av_log(NULL, AV_LOG_DEBUG, "OK\n");
- if(d[2]*256+d[3] == ast->prefix)
- ast->prefix_count++;
- else{
- ast->prefix= d[2]*256+d[3];
- ast->prefix_count= 0;
- }
+ get_le16(pb); //flags
- avi->stream_index= n;
- ast->packet_size= size + 8;
- ast->remaining= size;
+ for (; k <= last; k++)
+ ast->pal[k] = get_be32(pb)>>8;// b + (g << 8) + (r << 16);
+ ast->has_pal= 1;
+ goto resync;
+ } else if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
+ d[2]*256+d[3] == ast->prefix /*||
+ (d[2] == 'd' && d[3] == 'c') ||
+ (d[2] == 'w' && d[3] == 'b')*/) {
- {
- uint64_t pos= url_ftell(pb) - 8;
- if(!st->index_entries || !st->nb_index_entries || st->index_entries[st->nb_index_entries - 1].pos < pos){
- av_add_index_entry(st, pos, ast->frame_offset / FFMAX(1, ast->sample_size), size, 0, AVINDEX_KEYFRAME);
+//av_log(NULL, AV_LOG_DEBUG, "OK\n");
+ if(d[2]*256+d[3] == ast->prefix)
+ ast->prefix_count++;
+ else{
+ ast->prefix= d[2]*256+d[3];
+ ast->prefix_count= 0;
}
- }
- goto resync;
- }
- }
- /* palette changed chunk */
- if ( d[0] >= '0' && d[0] <= '9'
- && d[1] >= '0' && d[1] <= '9'
- && ((d[2] == 'p' && d[3] == 'c'))
- && n < s->nb_streams && i + size <= avi->fsize) {
- AVStream *st;
- int first, clr, flags, k, p;
-
- st = s->streams[n];
+ avi->stream_index= n;
+ ast->packet_size= size + 8;
+ ast->remaining= size;
- first = get_byte(pb);
- clr = get_byte(pb);
- if(!clr) /* all 256 colors used */
- clr = 256;
- flags = get_le16(pb);
- p = 4;
- for (k = first; k < clr + first; k++) {
- int r, g, b;
- r = get_byte(pb);
- g = get_byte(pb);
- b = get_byte(pb);
- get_byte(pb);
- st->codec->palctrl->palette[k] = b + (g << 8) + (r << 16);
+ {
+ uint64_t pos= url_ftell(pb) - 8;
+ if(!st->index_entries || !st->nb_index_entries || st->index_entries[st->nb_index_entries - 1].pos < pos){
+ av_add_index_entry(st, pos, ast->frame_offset / FFMAX(1, ast->sample_size), size, 0, AVINDEX_KEYFRAME);
+ }
+ }
+ goto resync;
}
- st->codec->palctrl->palette_changed = 1;
- goto resync;
}
-
}
return -1;
}
-/* XXX: we make the implicit supposition that the position are sorted
- for each stream */
+/* XXX: We make the implicit supposition that the positions are sorted
+ for each stream. */
static int avi_read_idx1(AVFormatContext *s, int size)
{
AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
int nb_index_entries, i;
AVStream *st;
AVIStream *ast;
if (nb_index_entries <= 0)
return -1;
- /* read the entries and sort them in each stream component */
+ /* Read the entries and sort them in each stream component. */
for(i = 0; i < nb_index_entries; i++) {
tag = get_le32(pb);
flags = get_le32(pb);
static int avi_load_index(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
uint32_t tag, size;
offset_t pos= url_ftell(pb);
if (ENABLE_DV_DEMUXER && avi->dv_demux) {
/* One and only one real stream for DV in AVI, and it has video */
- /* offsets. Calling with other stream indices should have failed */
+ /* offsets. Calling with other stream indexes should have failed */
/* the av_index_search_timestamp call above. */
assert(stream_index == 0);
/* Feed the DV video stream version of the timestamp to the */
- /* DV demux so it can synth correct timestamps */
+ /* DV demux so it can synthesize correct timestamps. */
dv_offset_reset(avi->dv_demux, timestamp);
- url_fseek(&s->pb, pos, SEEK_SET);
+ url_fseek(s->pb, pos, SEEK_SET);
avi->stream_index= -1;
return 0;
}
continue;
// assert(st2->codec->block_align);
- assert(st2->time_base.den == ast2->rate);
- assert(st2->time_base.num == ast2->scale);
+ assert((int64_t)st2->time_base.num*ast2->rate == (int64_t)st2->time_base.den*ast2->scale);
index = av_index_search_timestamp(
st2,
av_rescale(timestamp, st2->time_base.den*(int64_t)st->time_base.num, st->time_base.den * (int64_t)st2->time_base.num),
}
/* do the seek */
- url_fseek(&s->pb, pos, SEEK_SET);
+ url_fseek(s->pb, pos, SEEK_SET);
avi->stream_index= -1;
return 0;
}
for(i=0;i<s->nb_streams;i++) {
AVStream *st = s->streams[i];
- AVIStream *ast = st->priv_data;
- av_free(ast);
av_free(st->codec->palctrl);
}
static int avi_probe(AVProbeData *p)
{
+ int i;
+
/* check file header */
- if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
- p->buf[2] == 'F' && p->buf[3] == 'F' &&
- p->buf[8] == 'A' && p->buf[9] == 'V' &&
- p->buf[10] == 'I' && (p->buf[11] == ' ' || p->buf[11] == 0x19))
- return AVPROBE_SCORE_MAX;
- else
- return 0;
+ for(i=0; avi_headers[i][0]; i++)
+ if(!memcmp(p->buf , avi_headers[i] , 4) &&
+ !memcmp(p->buf+8, avi_headers[i]+4, 4))
+ return AVPROBE_SCORE_MAX;
+
+ return 0;
}
AVInputFormat avi_demuxer = {
"avi",
- "avi format",
+ NULL_IF_CONFIG_SMALL("AVI format"),
sizeof(AVIContext),
avi_probe,
avi_read_header,