/*
- * AVI decoder.
- * Copyright (c) 2001 Fabrice Bellard.
+ * AVI demuxer
+ * Copyright (c) 2001 Fabrice Bellard
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * 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 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,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "avformat.h"
-#include "avi.h"
-#include "dv.h"
//#define DEBUG
//#define DEBUG_SEEK
-typedef struct AVIIndexEntry {
- unsigned int flags;
- unsigned int pos;
- unsigned int cum_len; /* sum of all lengths before this packet */
-} AVIIndexEntry;
+#include <strings.h>
+#include "libavutil/intreadwrite.h"
+#include "libavutil/bswap.h"
+#include "avformat.h"
+#include "avi.h"
+#include "dv.h"
+#include "riff.h"
+
+#undef NDEBUG
+#include <assert.h>
typedef struct AVIStream {
- AVIIndexEntry *index_entries;
- int nb_index_entries;
- int index_entries_allocated_size;
- int frame_offset; /* current frame (video) or byte (audio) counter
+ int64_t frame_offset; /* current frame (video) or byte (audio) counter
(used to compute the pts) */
+ int remaining;
+ int packet_size;
+
int scale;
- int rate;
- int sample_size; /* audio only data */
- int start;
-
- int new_frame_offset; /* temporary storage (used during seek) */
- int cum_len; /* temporary storage (used during seek) */
-
+ int rate;
+ int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
+
+ int64_t cum_len; /* temporary storage (used during seek) */
+
int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
int prefix_count;
+ uint32_t pal[256];
+ int has_pal;
+ int dshow_block_align; ///< block align variable used to emulate bugs in the MS dshow demuxer
+
+ AVFormatContext *sub_ctx;
+ AVPacket sub_pkt;
+ uint8_t *sub_buffer;
} AVIStream;
typedef struct {
int64_t riff_end;
int64_t movi_end;
- offset_t movi_list;
+ int64_t fsize;
+ int64_t movi_list;
+ int64_t last_pkt_pos;
int index_loaded;
int is_odml;
+ int non_interleaved;
+ int stream_index;
DVDemuxContext* dv_demux;
+ int odml_depth;
+#define MAX_ODML_DEPTH 1000
} 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);
-#ifdef DEBUG
-static void print_tag(const char *str, unsigned int tag, int size)
-{
- printf("%s: tag=%c%c%c%c size=0x%x\n",
- str, tag & 0xff,
- (tag >> 8) & 0xff,
- (tag >> 16) & 0xff,
- (tag >> 24) & 0xff,
- size);
+#define print_tag(str, tag, size) \
+ av_dlog(NULL, "%s: tag=%c%c%c%c size=0x%x\n", \
+ str, tag & 0xff, \
+ (tag >> 8) & 0xff, \
+ (tag >> 16) & 0xff, \
+ (tag >> 24) & 0xff, \
+ size)
+
+static inline int get_duration(AVIStream *ast, int len){
+ if(ast->sample_size){
+ return len;
+ }else if (ast->dshow_block_align){
+ return (len + ast->dshow_block_align - 1)/ast->dshow_block_align;
+ }else
+ return 1;
}
-#endif
-static int get_riff(AVIContext *avi, ByteIOContext *pb)
+static int get_riff(AVFormatContext *s, AVIOContext *pb)
{
- uint32_t tag;
+ AVIContext *avi = s->priv_data;
+ char header[8];
+ int i;
+
/* check RIFF header */
- tag = get_le32(pb);
+ avio_read(pb, header, 4);
+ avi->riff_end = avio_rl32(pb); /* RIFF chunk size */
+ avi->riff_end += avio_tell(pb); /* RIFF chunk end */
+ avio_read(pb, header+4, 4);
- if (tag != MKTAG('R', 'I', 'F', 'F'))
+ for(i=0; avi_headers[i][0]; i++)
+ if(!memcmp(header, avi_headers[i], 8))
+ break;
+ if(!avi_headers[i][0])
return -1;
- 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', ' ') && tag != MKTAG('A', 'V', 'I', 'X'))
+
+ if(header[7] == 0x19)
+ av_log(s, 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;
+ AVIOContext *pb = s->pb;
+ int longs_pre_entry= avio_rl16(pb);
+ int index_sub_type = avio_r8(pb);
+ int index_type = avio_r8(pb);
+ int entries_in_use = avio_rl32(pb);
+ int chunk_id = avio_rl32(pb);
+ int64_t base = avio_rl64(pb);
+ int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0');
+ AVStream *st;
+ AVIStream *ast;
+ int i;
+ int64_t last_pos= -1;
+ int64_t filesize= avio_size(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",
+ longs_pre_entry,index_type, entries_in_use, chunk_id, base);
+#endif
+
+ if(stream_id >= s->nb_streams || stream_id < 0)
return -1;
-
+ st= s->streams[stream_id];
+ ast = st->priv_data;
+
+ if(index_sub_type)
+ return -1;
+
+ avio_rl32(pb);
+
+ if(index_type && longs_pre_entry != 2)
+ return -1;
+ if(index_type>1)
+ return -1;
+
+ if(filesize > 0 && base >= filesize){
+ av_log(s, AV_LOG_ERROR, "ODML index invalid\n");
+ if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF)
+ base &= 0xFFFFFFFF;
+ else
+ return -1;
+ }
+
+ for(i=0; i<entries_in_use; i++){
+ if(index_type){
+ int64_t pos= avio_rl32(pb) + base - 8;
+ int len = avio_rl32(pb);
+ int key= len >= 0;
+ len &= 0x7FFFFFFF;
+
+#ifdef DEBUG_SEEK
+ av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
+#endif
+ if(pb->eof_reached)
+ return -1;
+
+ if(last_pos == pos || pos == base - 8)
+ avi->non_interleaved= 1;
+ if(last_pos != pos && (len || !ast->sample_size))
+ av_add_index_entry(st, pos, ast->cum_len, len, 0, key ? AVINDEX_KEYFRAME : 0);
+
+ ast->cum_len += get_duration(ast, len);
+ last_pos= pos;
+ }else{
+ int64_t offset, pos;
+ int duration;
+ offset = avio_rl64(pb);
+ avio_rl32(pb); /* size */
+ duration = avio_rl32(pb);
+
+ if(pb->eof_reached)
+ return -1;
+
+ pos = avio_tell(pb);
+
+ if(avi->odml_depth > MAX_ODML_DEPTH){
+ av_log(s, AV_LOG_ERROR, "Too deeply nested ODML indexes\n");
+ return -1;
+ }
+
+ avio_seek(pb, offset+8, SEEK_SET);
+ avi->odml_depth++;
+ read_braindead_odml_indx(s, frame_num);
+ avi->odml_depth--;
+ frame_num += duration;
+
+ avio_seek(pb, pos, SEEK_SET);
+ }
+ }
+ avi->index_loaded=1;
return 0;
}
+static void clean_index(AVFormatContext *s){
+ int i;
+ int64_t j;
+
+ for(i=0; i<s->nb_streams; i++){
+ AVStream *st = s->streams[i];
+ AVIStream *ast = st->priv_data;
+ int n= st->nb_index_entries;
+ int max= ast->sample_size;
+ int64_t pos, size, ts;
+
+ if(n != 1 || ast->sample_size==0)
+ continue;
+
+ while(max < 1024) max+=max;
+
+ pos= st->index_entries[0].pos;
+ size= st->index_entries[0].size;
+ ts= st->index_entries[0].timestamp;
+
+ for(j=0; j<size; j+=max){
+ av_add_index_entry(st, pos+j, ts+j, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME);
+ }
+ }
+}
+
+static int avi_read_tag(AVFormatContext *s, AVStream *st, uint32_t tag, uint32_t size)
+{
+ AVIOContext *pb = s->pb;
+ char key[5] = {0}, *value;
+
+ size += (size & 1);
+
+ if (size == UINT_MAX)
+ return -1;
+ value = av_malloc(size+1);
+ if (!value)
+ return -1;
+ avio_read(pb, value, size);
+ value[size]=0;
+
+ AV_WL32(key, tag);
+
+ return av_metadata_set2(st ? &st->metadata : &s->metadata, key, value,
+ AV_METADATA_DONT_STRDUP_VAL);
+}
+
+static void avi_read_info(AVFormatContext *s, uint64_t end)
+{
+ while (avio_tell(s->pb) < end) {
+ uint32_t tag = avio_rl32(s->pb);
+ uint32_t size = avio_rl32(s->pb);
+ avi_read_tag(s, NULL, tag, size);
+ }
+}
+
+static const char months[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
+
+static void avi_metadata_creation_time(AVMetadata **metadata, char *date)
+{
+ char month[4], time[9], buffer[64];
+ int i, day, year;
+ /* parse standard AVI date format (ie. "Mon Mar 10 15:04:43 2003") */
+ if (sscanf(date, "%*3s%*[ ]%3s%*[ ]%2d%*[ ]%8s%*[ ]%4d",
+ month, &day, time, &year) == 4) {
+ for (i=0; i<12; i++)
+ if (!strcasecmp(month, months[i])) {
+ snprintf(buffer, sizeof(buffer), "%.4d-%.2d-%.2d %s",
+ year, i+1, day, time);
+ av_metadata_set2(metadata, "creation_time", buffer, 0);
+ }
+ } else if (date[4] == '/' && date[7] == '/') {
+ date[4] = date[7] = '-';
+ av_metadata_set2(metadata, "creation_time", date, 0);
+ }
+}
+
+static void avi_read_nikon(AVFormatContext *s, uint64_t end)
+{
+ while (avio_tell(s->pb) < end) {
+ uint32_t tag = avio_rl32(s->pb);
+ uint32_t size = avio_rl32(s->pb);
+ switch (tag) {
+ case MKTAG('n', 'c', 't', 'g'): { /* Nikon Tags */
+ uint64_t tag_end = avio_tell(s->pb) + size;
+ while (avio_tell(s->pb) < tag_end) {
+ uint16_t tag = avio_rl16(s->pb);
+ uint16_t size = avio_rl16(s->pb);
+ const char *name = NULL;
+ char buffer[64] = {0};
+ size -= avio_read(s->pb, buffer,
+ FFMIN(size, sizeof(buffer)-1));
+ switch (tag) {
+ case 0x03: name = "maker"; break;
+ case 0x04: name = "model"; break;
+ case 0x13: name = "creation_time";
+ if (buffer[4] == ':' && buffer[7] == ':')
+ buffer[4] = buffer[7] = '-';
+ break;
+ }
+ if (name)
+ av_metadata_set2(&s->metadata, name, buffer, 0);
+ avio_skip(s->pb, size);
+ }
+ break;
+ }
+ default:
+ avio_skip(s->pb, size);
+ break;
+ }
+ }
+}
+
static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
- uint32_t tag, tag1, handler;
- int codec_type, stream_index, frame_period, bit_rate, scale, rate;
- unsigned int size, nb_frames;
- int i, n;
+ AVIOContext *pb = s->pb;
+ unsigned int tag, tag1, handler;
+ int codec_type, stream_index, frame_period, bit_rate;
+ unsigned int size;
+ int i;
AVStream *st;
- AVIStream *ast;
- int xan_video = 0; /* hack to support Xan A/V */
+ AVIStream *ast = NULL;
+ int avih_width=0, avih_height=0;
+ int amv_file_format=0;
+ uint64_t list_end = 0;
+ int ret;
+
+ avi->stream_index= -1;
- if (get_riff(avi, pb) < 0)
+ if (get_riff(s, pb) < 0)
return -1;
+ avi->fsize = avio_size(pb);
+ if(avi->fsize<=0)
+ avi->fsize= avi->riff_end == 8 ? INT64_MAX : avi->riff_end;
+
/* first list tag */
stream_index = -1;
codec_type = -1;
frame_period = 0;
for(;;) {
- if (url_feof(pb))
+ if (pb->eof_reached)
goto fail;
- tag = get_le32(pb);
- size = get_le32(pb);
-#ifdef DEBUG
+ tag = avio_rl32(pb);
+ size = avio_rl32(pb);
+
print_tag("tag", tag, size);
-#endif
switch(tag) {
case MKTAG('L', 'I', 'S', 'T'):
- /* ignored, except when start of video packets */
- tag1 = get_le32(pb);
-#ifdef DEBUG
+ list_end = avio_tell(pb) + size;
+ /* Ignored, except at start of video packets. */
+ tag1 = avio_rl32(pb);
+
print_tag("list", tag1, 0);
-#endif
+
if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
- avi->movi_list = url_ftell(pb) - 4;
- if(size) avi->movi_end = avi->movi_list + size;
- else avi->movi_end = url_filesize(url_fileno(pb));
-#ifdef DEBUG
- printf("movi end=%Lx\n", avi->movi_end);
-#endif
+ avi->movi_list = avio_tell(pb) - 4;
+ if(size) avi->movi_end = avi->movi_list + size + (size & 1);
+ else avi->movi_end = avio_size(pb);
+ av_dlog(NULL, "movi end=%"PRIx64"\n", avi->movi_end);
goto end_of_header;
}
+ else if (tag1 == MKTAG('I', 'N', 'F', 'O'))
+ avi_read_info(s, list_end);
+ else if (tag1 == MKTAG('n', 'c', 'd', 't'))
+ avi_read_nikon(s, list_end);
+
break;
+ case MKTAG('I', 'D', 'I', 'T'): {
+ unsigned char date[64] = {0};
+ size += (size & 1);
+ size -= avio_read(pb, date, FFMIN(size, sizeof(date)-1));
+ avio_skip(pb, size);
+ avi_metadata_creation_time(&s->metadata, date);
+ break;
+ }
case MKTAG('d', 'm', 'l', 'h'):
- avi->is_odml = 1;
- url_fskip(pb, size + (size & 1));
- break;
+ avi->is_odml = 1;
+ avio_skip(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, 4 * 4);
- n = get_le32(pb);
- for(i=0;i<n;i++) {
- AVIStream *ast;
- st = av_new_stream(s, i);
+ frame_period = avio_rl32(pb);
+ bit_rate = avio_rl32(pb) * 8;
+ avio_rl32(pb);
+ avi->non_interleaved |= avio_rl32(pb) & AVIF_MUSTUSEINDEX;
+
+ avio_skip(pb, 2 * 4);
+ avio_rl32(pb);
+ avio_rl32(pb);
+ avih_width=avio_rl32(pb);
+ avih_height=avio_rl32(pb);
+
+ avio_skip(pb, size - 10 * 4);
+ break;
+ case MKTAG('s', 't', 'r', 'h'):
+ /* stream header */
+
+ tag1 = avio_rl32(pb);
+ handler = avio_rl32(pb); /* codec tag */
+
+ if(tag1 == MKTAG('p', 'a', 'd', 's')){
+ avio_skip(pb, size - 8);
+ break;
+ }else{
+ stream_index++;
+ st = av_new_stream(s, stream_index);
if (!st)
goto fail;
if (!ast)
goto fail;
st->priv_data = ast;
- }
- url_fskip(pb, size - 7 * 4);
- break;
- case MKTAG('s', 't', 'r', 'h'):
- /* stream header */
- stream_index++;
- tag1 = get_le32(pb);
- handler = get_le32(pb); /* codec tag */
-#ifdef DEBUG
- print_tag("strh", tag1, -1);
-#endif
- switch(tag1) {
- case MKTAG('i', 'a', 'v', 's'):
- case MKTAG('i', 'v', 'a', 's'):
- /*
- * After some consideration -- I don't think we
- * have to support anything but DV in a type1 AVIs.
- */
- if (s->nb_streams != 1)
- goto fail;
-
- if (handler != MKTAG('d', 'v', 's', 'd') &&
- handler != MKTAG('d', 'v', 'h', 'd') &&
- handler != MKTAG('d', 'v', 's', 'l'))
- goto fail;
-
- ast = s->streams[0]->priv_data;
- av_freep(&s->streams[0]->codec.extradata);
- av_freep(&s->streams[0]);
- s->nb_streams = 0;
- avi->dv_demux = dv_init_demux(s);
- if (!avi->dv_demux)
- goto fail;
- s->streams[0]->priv_data = ast;
- url_fskip(pb, 3 * 4);
- ast->scale = get_le32(pb);
- ast->rate = get_le32(pb);
- stream_index = s->nb_streams - 1;
- url_fskip(pb, size - 7*4);
- break;
- case MKTAG('v', 'i', 'd', 's'):
- codec_type = CODEC_TYPE_VIDEO;
-
- if (stream_index >= s->nb_streams) {
- url_fskip(pb, size - 8);
- break;
- }
+ }
+ if(amv_file_format)
+ tag1 = stream_index ? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
- st = s->streams[stream_index];
- ast = st->priv_data;
- st->codec.stream_codec_tag= handler;
-
- get_le32(pb); /* flags */
- get_le16(pb); /* priority */
- get_le16(pb); /* language */
- get_le32(pb); /* XXX: initial frame ? */
- scale = get_le32(pb); /* scale */
- rate = get_le32(pb); /* rate */
-
- if(scale && rate){
- }else if(frame_period){
- rate = 1000000;
- scale = frame_period;
- }else{
- rate = 25;
- scale = 1;
+ print_tag("strh", tag1, -1);
+
+ if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
+ int64_t dv_dur;
+
+ /*
+ * After some consideration -- I don't think we
+ * have to support anything but DV in type1 AVIs.
+ */
+ if (s->nb_streams != 1)
+ goto fail;
+
+ if (handler != MKTAG('d', 'v', 's', 'd') &&
+ handler != MKTAG('d', 'v', 'h', 'd') &&
+ handler != MKTAG('d', 'v', 's', 'l'))
+ goto fail;
+
+ ast = s->streams[0]->priv_data;
+ av_freep(&s->streams[0]->codec->extradata);
+ av_freep(&s->streams[0]->codec);
+ av_freep(&s->streams[0]);
+ s->nb_streams = 0;
+ if (CONFIG_DV_DEMUXER) {
+ avi->dv_demux = dv_init_demux(s);
+ if (!avi->dv_demux)
+ goto fail;
}
- ast->rate = rate;
- ast->scale = scale;
- av_set_pts_info(st, 64, scale, rate);
- st->codec.frame_rate = rate;
- st->codec.frame_rate_base = scale;
- get_le32(pb); /* start */
- nb_frames = get_le32(pb);
- st->start_time = 0;
- st->duration = av_rescale(nb_frames,
- st->codec.frame_rate_base * AV_TIME_BASE,
- st->codec.frame_rate);
- url_fskip(pb, size - 9 * 4);
+ s->streams[0]->priv_data = ast;
+ avio_skip(pb, 3 * 4);
+ ast->scale = avio_rl32(pb);
+ ast->rate = avio_rl32(pb);
+ avio_skip(pb, 4); /* start time */
+
+ dv_dur = avio_rl32(pb);
+ if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) {
+ dv_dur *= AV_TIME_BASE;
+ s->duration = av_rescale(dv_dur, ast->scale, ast->rate);
+ }
+ /*
+ * else, leave duration alone; timing estimation in utils.c
+ * will make a guess based on bitrate.
+ */
+
+ stream_index = s->nb_streams - 1;
+ avio_skip(pb, size - 9*4);
break;
- case MKTAG('a', 'u', 'd', 's'):
- {
- unsigned int length;
+ }
- codec_type = CODEC_TYPE_AUDIO;
+ assert(stream_index < s->nb_streams);
+ st->codec->stream_codec_tag= handler;
- if (stream_index >= s->nb_streams) {
- url_fskip(pb, size - 8);
- break;
- }
- st = s->streams[stream_index];
- ast = st->priv_data;
-
- get_le32(pb); /* flags */
- get_le16(pb); /* priority */
- get_le16(pb); /* language */
- get_le32(pb); /* initial frame */
- ast->scale = get_le32(pb); /* scale */
- ast->rate = get_le32(pb);
- av_set_pts_info(st, 64, ast->scale, ast->rate);
- ast->start= get_le32(pb); /* start */
- length = get_le32(pb); /* length, in samples or bytes */
- get_le32(pb); /* buffer size */
- get_le32(pb); /* quality */
- ast->sample_size = get_le32(pb); /* sample ssize */
-//av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d\n", ast->scale, ast->rate, ast->sample_size, ast->start);
- st->start_time = 0;
- if (ast->rate != 0)
- st->duration = (int64_t)length * AV_TIME_BASE / ast->rate;
- url_fskip(pb, size - 12 * 4);
+ avio_rl32(pb); /* flags */
+ avio_rl16(pb); /* priority */
+ avio_rl16(pb); /* language */
+ avio_rl32(pb); /* initial frame */
+ ast->scale = avio_rl32(pb);
+ ast->rate = avio_rl32(pb);
+ 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);
+
+ ast->cum_len=avio_rl32(pb); /* start */
+ st->nb_frames = avio_rl32(pb);
+
+ st->start_time = 0;
+ avio_rl32(pb); /* buffer size */
+ avio_rl32(pb); /* quality */
+ ast->sample_size = avio_rl32(pb); /* sample ssize */
+ ast->cum_len *= FFMAX(1, ast->sample_size);
+// av_log(s, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
+
+ switch(tag1) {
+ case MKTAG('v', 'i', 'd', 's'):
+ codec_type = AVMEDIA_TYPE_VIDEO;
+
+ ast->sample_size = 0;
+ break;
+ case MKTAG('a', 'u', 'd', 's'):
+ codec_type = AVMEDIA_TYPE_AUDIO;
break;
case MKTAG('t', 'x', 't', 's'):
- //FIXME
- codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
- url_fskip(pb, size - 8);
+ codec_type = AVMEDIA_TYPE_SUBTITLE;
break;
- case MKTAG('p', 'a', 'd', 's'):
- codec_type = CODEC_TYPE_UNKNOWN;
- url_fskip(pb, size - 8);
- stream_index--;
+ case MKTAG('d', 'a', 't', 's'):
+ codec_type = AVMEDIA_TYPE_DATA;
break;
default:
av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
goto fail;
}
+ if(ast->sample_size == 0)
+ st->duration = st->nb_frames;
+ ast->frame_offset= ast->cum_len;
+ avio_skip(pb, size - 12 * 4);
break;
case MKTAG('s', 't', 'r', 'f'):
/* stream header */
- if (stream_index >= s->nb_streams || avi->dv_demux) {
- url_fskip(pb, size);
+ if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
+ avio_skip(pb, size);
} else {
+ uint64_t cur_pos = avio_tell(pb);
+ if (cur_pos < list_end)
+ size = FFMIN(size, list_end - cur_pos);
st = s->streams[stream_index];
switch(codec_type) {
- case CODEC_TYPE_VIDEO:
- 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 */
- tag1 = get_le32(pb);
- get_le32(pb); /* ImageSize */
- get_le32(pb); /* XPelsPerMeter */
- get_le32(pb); /* YPelsPerMeter */
- get_le32(pb); /* ClrUsed */
- get_le32(pb); /* ClrImportant */
-
- st->codec.extradata_size= size - 10*4;
- st->codec.extradata= av_malloc(st->codec.extradata_size);
- get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
-
- 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)) {
- 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.palctrl->palette[i] = bswap_32(((uint32_t*)st->codec.extradata)[i]);
+ case AVMEDIA_TYPE_VIDEO:
+ if(amv_file_format){
+ st->codec->width=avih_width;
+ st->codec->height=avih_height;
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = CODEC_ID_AMV;
+ avio_skip(pb, size);
+ break;
+ }
+ tag1 = ff_get_bmp_header(pb, st);
+
+ if (tag1 == MKTAG('D', 'X', 'S', 'B') || tag1 == MKTAG('D','X','S','A')) {
+ st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ st->codec->codec_tag = tag1;
+ st->codec->codec_id = CODEC_ID_XSUB;
+ break;
+ }
+
+ if(size > 10*4 && size<(1<<30)){
+ st->codec->extradata_size= size - 10*4;
+ st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!st->codec->extradata) {
+ st->codec->extradata_size= 0;
+ return AVERROR(ENOMEM);
+ }
+ avio_read(pb, st->codec->extradata, st->codec->extradata_size);
+ }
+
+ if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
+ avio_r8(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 Libav. */
+ if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
+ int pal_size = (1 << st->codec->bits_per_coded_sample) << 2;
+ const uint8_t *pal_src;
+
+ pal_size = FFMIN(pal_size, st->codec->extradata_size);
+ pal_src = st->codec->extradata + st->codec->extradata_size - pal_size;
+#if HAVE_BIGENDIAN
+ for (i = 0; i < pal_size/4; i++)
+ ast->pal[i] = av_bswap32(((uint32_t*)pal_src)[i]);
#else
- memcpy(st->codec.palctrl->palette, st->codec.extradata,
- FFMIN(st->codec.extradata_size, AVPALETTE_SIZE));
+ memcpy(ast->pal, pal_src, pal_size);
#endif
- st->codec.palctrl->palette_changed = 1;
+ ast->has_pal = 1;
}
-#ifdef DEBUG
print_tag("video", tag1, 0);
-#endif
- st->codec.codec_type = CODEC_TYPE_VIDEO;
- st->codec.codec_tag = tag1;
- st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
- if (st->codec.codec_id == CODEC_ID_XAN_WC4)
- xan_video = 1;
-// url_fskip(pb, size - 5 * 4);
+
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_tag = tag1;
+ st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
+ st->need_parsing = AVSTREAM_PARSE_HEADERS; // This is needed to get the pict type which is necessary for generating correct pts.
+ // Support "Resolution 1:1" for Avid AVI Codec
+ if(tag1 == MKTAG('A', 'V', 'R', 'n') &&
+ st->codec->extradata_size >= 31 &&
+ !memcmp(&st->codec->extradata[28], "1:1", 3))
+ st->codec->codec_id = CODEC_ID_RAWVIDEO;
+
+ if(st->codec->codec_tag==0 && st->codec->height > 0 && st->codec->extradata_size < 1U<<30){
+ st->codec->extradata_size+= 9;
+ st->codec->extradata= av_realloc(st->codec->extradata, st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if(st->codec->extradata)
+ memcpy(st->codec->extradata + st->codec->extradata_size - 9, "BottomUp", 9);
+ }
+ st->codec->height= FFABS(st->codec->height);
+
+// avio_skip(pb, size - 5 * 4);
break;
- case CODEC_TYPE_AUDIO:
- get_wav_header(pb, &st->codec, size);
- if (size%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
- url_fskip(pb, 1);
- /* special case time: To support Xan DPCM, hardcode
- * the format if Xxan is the video codec */
- st->need_parsing = 1;
- /* force parsing as several audio frames can be in
- one packet */
- if (xan_video)
- st->codec.codec_id = CODEC_ID_XAN_DPCM;
+ case AVMEDIA_TYPE_AUDIO:
+ ret = ff_get_wav_header(pb, st->codec, size);
+ if (ret < 0)
+ return ret;
+ ast->dshow_block_align= st->codec->block_align;
+ 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&1) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
+ avio_skip(pb, 1);
+ /* Force parsing as several audio frames can be in
+ * 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. */
+ 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
+ * audio in the header but have Axan as stream_code_tag. */
+ if (st->codec->stream_codec_tag == AV_RL32("Axan")){
+ 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;
+ ast->dshow_block_align = 0;
+ }
+ break;
+ case AVMEDIA_TYPE_SUBTITLE:
+ st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ st->codec->codec_id = CODEC_ID_PROBE;
break;
default:
- st->codec.codec_type = CODEC_TYPE_DATA;
- st->codec.codec_id= CODEC_ID_NONE;
- st->codec.codec_tag= 0;
- url_fskip(pb, size);
+ st->codec->codec_type = AVMEDIA_TYPE_DATA;
+ st->codec->codec_id= CODEC_ID_NONE;
+ st->codec->codec_tag= 0;
+ avio_skip(pb, size);
break;
}
}
break;
+ case MKTAG('i', 'n', 'd', 'x'):
+ i= avio_tell(pb);
+ if(pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX)){
+ read_braindead_odml_indx(s, 0);
+ }
+ avio_seek(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];
+ avio_rl32(pb);
+ avio_rl32(pb);
+ avio_rl32(pb);
+ avio_rl32(pb);
+ avio_rl32(pb);
+
+ active_aspect.den= avio_rl16(pb);
+ active_aspect.num= avio_rl16(pb);
+ active.num = avio_rl32(pb);
+ active.den = avio_rl32(pb);
+ avio_rl32(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;
+ }
+ avio_skip(pb, size);
+ break;
+ case MKTAG('s', 't', 'r', 'n'):
+ if(s->nb_streams){
+ avi_read_tag(s, s->streams[s->nb_streams-1], tag, size);
+ break;
+ }
default:
+ if(size > 1000000){
+ 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 = avio_tell(pb) - 4;
+ avi->movi_end = avio_size(pb);
+ goto end_of_header;
+ }
/* skip tag */
size += (size & 1);
- url_fskip(pb, size);
+ avio_skip(pb, size);
break;
}
}
/* 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;
}
- assert(!avi->index_loaded);
- avi_load_index(s);
+ if(!avi->index_loaded && pb->seekable)
+ avi_load_index(s);
avi->index_loaded = 1;
-
+ avi->non_interleaved |= guess_ni_flag(s);
+ for(i=0; i<s->nb_streams; i++){
+ AVStream *st = s->streams[i];
+ if(st->nb_index_entries)
+ break;
+ }
+ if(i==s->nb_streams && avi->non_interleaved) {
+ av_log(s, AV_LOG_WARNING, "non-interleaved AVI without index, switching to interleaved\n");
+ avi->non_interleaved=0;
+ }
+
+ if(avi->non_interleaved) {
+ av_log(s, AV_LOG_INFO, "non-interleaved AVI\n");
+ clean_index(s);
+ }
+
+ ff_metadata_conv_ctx(s, NULL, ff_avi_metadata_conv);
+
+ return 0;
+}
+
+static int read_gab2_sub(AVStream *st, AVPacket *pkt) {
+ if (!strcmp(pkt->data, "GAB2") && AV_RL16(pkt->data+5) == 2) {
+ uint8_t desc[256];
+ int score = AVPROBE_SCORE_MAX / 2, ret;
+ AVIStream *ast = st->priv_data;
+ AVInputFormat *sub_demuxer;
+ AVRational time_base;
+ AVIOContext *pb = avio_alloc_context( pkt->data + 7,
+ pkt->size - 7,
+ 0, NULL, NULL, NULL, NULL);
+ AVProbeData pd;
+ unsigned int desc_len = avio_rl32(pb);
+
+ if (desc_len > pb->buf_end - pb->buf_ptr)
+ goto error;
+
+ ret = avio_get_str16le(pb, desc_len, desc, sizeof(desc));
+ avio_skip(pb, desc_len - ret);
+ if (*desc)
+ av_metadata_set2(&st->metadata, "title", desc, 0);
+
+ avio_rl16(pb); /* flags? */
+ avio_rl32(pb); /* data size */
+
+ pd = (AVProbeData) { .buf = pb->buf_ptr, .buf_size = pb->buf_end - pb->buf_ptr };
+ if (!(sub_demuxer = av_probe_input_format2(&pd, 1, &score)))
+ goto error;
+
+ if (!av_open_input_stream(&ast->sub_ctx, pb, "", sub_demuxer, NULL)) {
+ av_read_packet(ast->sub_ctx, &ast->sub_pkt);
+ *st->codec = *ast->sub_ctx->streams[0]->codec;
+ ast->sub_ctx->streams[0]->codec->extradata = NULL;
+ time_base = ast->sub_ctx->streams[0]->time_base;
+ av_set_pts_info(st, 64, time_base.num, time_base.den);
+ }
+ ast->sub_buffer = pkt->data;
+ memset(pkt, 0, sizeof(*pkt));
+ return 1;
+error:
+ av_freep(&pb);
+ }
return 0;
}
+static AVStream *get_subtitle_pkt(AVFormatContext *s, AVStream *next_st,
+ AVPacket *pkt)
+{
+ AVIStream *ast, *next_ast = next_st->priv_data;
+ int64_t ts, next_ts, ts_min = INT64_MAX;
+ AVStream *st, *sub_st = NULL;
+ int i;
+
+ next_ts = av_rescale_q(next_ast->frame_offset, next_st->time_base,
+ AV_TIME_BASE_Q);
+
+ for (i=0; i<s->nb_streams; i++) {
+ st = s->streams[i];
+ ast = st->priv_data;
+ if (st->discard < AVDISCARD_ALL && ast && ast->sub_pkt.data) {
+ ts = av_rescale_q(ast->sub_pkt.dts, st->time_base, AV_TIME_BASE_Q);
+ if (ts <= next_ts && ts < ts_min) {
+ ts_min = ts;
+ sub_st = st;
+ }
+ }
+ }
+
+ if (sub_st) {
+ ast = sub_st->priv_data;
+ *pkt = ast->sub_pkt;
+ pkt->stream_index = sub_st->index;
+ if (av_read_packet(ast->sub_ctx, &ast->sub_pkt) < 0)
+ ast->sub_pkt.data = NULL;
+ }
+ return sub_st;
+}
+
+static int get_stream_idx(int *d){
+ if( d[0] >= '0' && d[0] <= '9'
+ && d[1] >= '0' && d[1] <= '9'){
+ return (d[0] - '0') * 10 + (d[1] - '0');
+ }else{
+ return 100; //invalid stream ID
+ }
+}
+
static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
- int n, d[8], size;
- offset_t i;
+ AVIOContext *pb = s->pb;
+ int n, d[8];
+ unsigned int size;
+ int64_t i, sync;
void* dstr;
- memset(d, -1, sizeof(int)*8);
-
- if (avi->dv_demux) {
- size = dv_get_packet(avi->dv_demux, pkt);
- if (size >= 0)
- return size;
+ if (CONFIG_DV_DEMUXER && avi->dv_demux) {
+ int size = dv_get_packet(avi->dv_demux, pkt);
+ if (size >= 0)
+ return size;
}
-
- for(i=url_ftell(pb); !url_feof(pb); i++) {
- int j;
- if (i >= avi->movi_end) {
- if (avi->is_odml) {
- url_fskip(pb, avi->riff_end - i);
- avi->riff_end = avi->movi_end = url_filesize(url_fileno(pb));
- } else
- break;
- }
+ if(avi->non_interleaved){
+ int best_stream_index = 0;
+ AVStream *best_st= NULL;
+ AVIStream *best_ast;
+ int64_t best_ts= INT64_MAX;
+ int i;
+
+ for(i=0; i<s->nb_streams; i++){
+ AVStream *st = s->streams[i];
+ AVIStream *ast = st->priv_data;
+ int64_t ts= ast->frame_offset;
+ int64_t last_ts;
+
+ if(!st->nb_index_entries)
+ continue;
+
+ last_ts = st->index_entries[st->nb_index_entries - 1].timestamp;
+ if(!ast->remaining && ts > last_ts)
+ continue;
+
+ ts = av_rescale_q(ts, st->time_base, (AVRational){FFMAX(1, ast->sample_size), AV_TIME_BASE});
+
+// av_log(s, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
+ if(ts < best_ts){
+ 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_q(best_ts, (AVRational){FFMAX(1, best_ast->sample_size), AV_TIME_BASE}, best_st->time_base);
+ if(best_ast->remaining)
+ i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
+ else{
+ i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY);
+ if(i>=0)
+ best_ast->frame_offset= best_st->index_entries[i].timestamp;
+ }
+
+// av_log(s, AV_LOG_DEBUG, "%d\n", i);
+ if(i>=0){
+ int64_t pos= best_st->index_entries[i].pos;
+ pos += best_ast->packet_size - best_ast->remaining;
+ avio_seek(s->pb, pos + 8, SEEK_SET);
+// av_log(s, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
+
+ assert(best_ast->remaining <= best_ast->packet_size);
+
+ avi->stream_index= best_stream_index;
+ if(!best_ast->remaining)
+ best_ast->packet_size=
+ best_ast->remaining= best_st->index_entries[i].size;
+ }
+ }
+
+resync:
+ if(avi->stream_index >= 0){
+ AVStream *st= s->streams[ avi->stream_index ];
+ AVIStream *ast= st->priv_data;
+ int size, err;
+
+ if(get_subtitle_pkt(s, st, pkt))
+ return 0;
+
+ if(ast->sample_size <= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
+ size= INT_MAX;
+ else if(ast->sample_size < 32)
+ // arbitrary multiplier to avoid tiny packets for raw PCM data
+ size= 1024*ast->sample_size;
+ else
+ size= ast->sample_size;
+
+ if(size > ast->remaining)
+ size= ast->remaining;
+ avi->last_pkt_pos= avio_tell(pb);
+ err= av_get_packet(pb, pkt, size);
+ if(err<0)
+ return err;
+
+ if(ast->has_pal && pkt->data && pkt->size<(unsigned)INT_MAX/2){
+ uint8_t *pal;
+ pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
+ if(!pal){
+ av_log(s, AV_LOG_ERROR, "Failed to allocate data for palette\n");
+ }else{
+ memcpy(pal, ast->pal, AVPALETTE_SIZE);
+ ast->has_pal = 0;
+ }
+ }
+
+ if (CONFIG_DV_DEMUXER && avi->dv_demux) {
+ dstr = pkt->destruct;
+ size = dv_produce_packet(avi->dv_demux, pkt,
+ pkt->data, pkt->size);
+ pkt->destruct = dstr;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ if (size < 0)
+ av_free_packet(pkt);
+ } else if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
+ && !st->codec->codec_tag && read_gab2_sub(st, pkt)) {
+ ast->frame_offset++;
+ avi->stream_index = -1;
+ ast->remaining = 0;
+ goto resync;
+ } else {
+ /* XXX: How to handle B-frames in AVI? */
+ pkt->dts = ast->frame_offset;
+// pkt->dts += ast->start;
+ if(ast->sample_size)
+ pkt->dts /= ast->sample_size;
+//av_log(s, AV_LOG_DEBUG, "dts:%"PRId64" offset:%"PRId64" %d/%d smpl_siz:%d base:%d st:%d size:%d\n", pkt->dts, ast->frame_offset, ast->scale, ast->rate, ast->sample_size, AV_TIME_BASE, avi->stream_index, size);
+ pkt->stream_index = avi->stream_index;
+
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ AVIndexEntry *e;
+ int index;
+ assert(st->index_entries);
+
+ index= av_index_search_timestamp(st, ast->frame_offset, 0);
+ e= &st->index_entries[index];
+
+ if(index >= 0 && e->timestamp == ast->frame_offset){
+ if (e->flags & AVINDEX_KEYFRAME)
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ }
+ } else {
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ }
+ ast->frame_offset += get_duration(ast, pkt->size);
+ }
+ ast->remaining -= size;
+ if(!ast->remaining){
+ avi->stream_index= -1;
+ ast->packet_size= 0;
+ }
+
+ return size;
+ }
+
+ memset(d, -1, sizeof(int)*8);
+ for(i=sync=avio_tell(pb); !pb->eof_reached; i++) {
+ int j;
for(j=0; j<7; j++)
d[j]= d[j+1];
- d[7]= get_byte(pb);
-
+ d[7]= avio_r8(pb);
+
size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24);
-
- if( d[2] >= '0' && d[2] <= '9'
- && d[3] >= '0' && d[3] <= '9'){
- n= (d[2] - '0') * 10 + (d[3] - '0');
- }else{
- n= 100; //invalid stream id
- }
-//av_log(NULL, AV_LOG_DEBUG, "%X %X %X %X %X %X %X %X %lld %d %d\n", d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n);
- if(i + size > avi->movi_end || d[0]<0)
+
+ n= get_stream_idx(d+2);
+//av_log(s, AV_LOG_DEBUG, "%X %X %X %X %X %X %X %X %"PRId64" %d %d\n", d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n);
+ if(i + (uint64_t)size > avi->fsize || d[0]<0)
continue;
-
+
//parse ix##
if( (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams)
- //parse JUNK
- ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')){
- url_fskip(pb, size);
- i+= size;
- memset(d, -1, sizeof(int)*8);
-//av_log(NULL, AV_LOG_DEBUG, "SKIP\n");
- continue;
+ //parse JUNK
+ ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')
+ ||(d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')){
+ avio_skip(pb, size);
+//av_log(s, AV_LOG_DEBUG, "SKIP\n");
+ goto resync;
}
- if( d[0] >= '0' && d[0] <= '9'
- && d[1] >= '0' && d[1] <= '9'){
- n= (d[0] - '0') * 10 + (d[1] - '0');
- }else{
- n= 100; //invalid stream id
+ //parse stray LIST
+ if(d[0] == 'L' && d[1] == 'I' && d[2] == 'S' && d[3] == 'T'){
+ avio_skip(pb, 4);
+ goto resync;
+ }
+
+ n= get_stream_idx(d);
+
+ if(!((i-avi->last_pkt_pos)&1) && get_stream_idx(d+1) < s->nb_streams)
+ continue;
+
+ //detect ##ix chunk and skip
+ if(d[2] == 'i' && d[3] == 'x' && n < s->nb_streams){
+ avio_skip(pb, size);
+ goto resync;
}
-
+
//parse ##dc/##wb
if(n < s->nb_streams){
- AVStream *st;
- AVIStream *ast;
- st = s->streams[n];
- ast = st->priv_data;
-
- if( (ast->prefix_count<5 && 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')*/) {
-
-//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;
- }
+ AVStream *st;
+ AVIStream *ast;
+ st = s->streams[n];
+ ast = st->priv_data;
- av_new_packet(pkt, size);
- get_buffer(pb, pkt->data, size);
- if (size & 1) {
- get_byte(pb);
- size++;
- }
-
- if (avi->dv_demux) {
- dstr = pkt->destruct;
- size = dv_produce_packet(avi->dv_demux, pkt,
- pkt->data, pkt->size);
- pkt->destruct = dstr;
- pkt->flags |= PKT_FLAG_KEY;
- } else {
- /* XXX: how to handle B frames in avi ? */
- pkt->dts = ast->frame_offset;
-// pkt->dts += ast->start;
- if(ast->sample_size)
- pkt->dts /= ast->sample_size;
-//av_log(NULL, AV_LOG_DEBUG, "dts:%Ld offset:%d %d/%d smpl_siz:%d base:%d st:%d size:%d\n", pkt->dts, ast->frame_offset, ast->scale, ast->rate, ast->sample_size, AV_TIME_BASE, n, size);
- pkt->stream_index = n;
- /* FIXME: We really should read index for that */
- if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
- if (ast->frame_offset < ast->nb_index_entries) {
- if (ast->index_entries[ast->frame_offset].flags & AVIIF_INDEX)
- pkt->flags |= PKT_FLAG_KEY;
- } else {
- /* if no index, better to say that all frames
- are key frames */
- pkt->flags |= PKT_FLAG_KEY;
- }
- } else {
- pkt->flags |= PKT_FLAG_KEY;
+ 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 == AVMEDIA_TYPE_VIDEO
+ && st1->codec->codec_type == AVMEDIA_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(ast->sample_size)
- ast->frame_offset += pkt->size;
- else
- ast->frame_offset++;
- }
- return size;
- }
- }
- /* 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->movi_end) {
+ }
- AVStream *st;
- int first, clr, flags, k, p;
- st = s->streams[n];
+ if( (st->discard >= AVDISCARD_DEFAULT && size==0)
+ /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & AV_PKT_FLAG_KEY))*/ //FIXME needs a little reordering
+ || st->discard >= AVDISCARD_ALL){
+ ast->frame_offset += get_duration(ast, size);
+ avio_skip(pb, size);
+ goto resync;
+ }
+
+ if (d[2] == 'p' && d[3] == 'c' && size<=4*256+4) {
+ int k = avio_r8(pb);
+ int last = (k + avio_r8(pb) - 1) & 0xFF;
+
+ avio_rl16(pb); //flags
+
+ for (; k <= last; k++)
+ ast->pal[k] = avio_rb32(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')*/) {
+
+//av_log(s, 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;
+ }
- first = get_byte(pb);
- clr = get_byte(pb);
- 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);
+ avi->stream_index= n;
+ ast->packet_size= size + 8;
+ ast->remaining= size;
+
+ if(size || !ast->sample_size){
+ uint64_t pos= avio_tell(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, size, 0, AVINDEX_KEYFRAME);
+ }
+ }
+ goto resync;
}
- st->codec.palctrl->palette_changed = 1;
}
-
}
- return -1;
+ return AVERROR_EOF;
}
-/* 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)
{
- ByteIOContext *pb = &s->pb;
+ AVIContext *avi = s->priv_data;
+ AVIOContext *pb = s->pb;
int nb_index_entries, i;
AVStream *st;
AVIStream *ast;
- AVIIndexEntry *ie, *entries;
unsigned int index, tag, flags, pos, len;
-
+ unsigned last_pos= -1;
+
nb_index_entries = size / 16;
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);
- pos = get_le32(pb);
- len = get_le32(pb);
-#if defined(DEBUG_SEEK) && 0
- printf("%d: tag=0x%x flags=0x%x pos=0x%x len=%d\n",
+ tag = avio_rl32(pb);
+ flags = avio_rl32(pb);
+ pos = avio_rl32(pb);
+ len = avio_rl32(pb);
+#if defined(DEBUG_SEEK)
+ av_log(s, AV_LOG_DEBUG, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
i, tag, flags, pos, len);
#endif
+ if(i==0 && pos > avi->movi_list)
+ avi->movi_list= 0; //FIXME better check
+ pos += avi->movi_list;
+
index = ((tag & 0xff) - '0') * 10;
index += ((tag >> 8) & 0xff) - '0';
if (index >= s->nb_streams)
continue;
st = s->streams[index];
ast = st->priv_data;
-
- entries = av_fast_realloc(ast->index_entries,
- &ast->index_entries_allocated_size,
- (ast->nb_index_entries + 1) *
- sizeof(AVIIndexEntry));
- if (entries) {
- ast->index_entries = entries;
- ie = &entries[ast->nb_index_entries++];
- ie->flags = flags;
- ie->pos = pos;
- ie->cum_len = ast->cum_len;
- ast->cum_len += len;
- }
+
+#if defined(DEBUG_SEEK)
+ av_log(s, AV_LOG_DEBUG, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
+#endif
+ if(pb->eof_reached)
+ return -1;
+
+ if(last_pos == pos)
+ avi->non_interleaved= 1;
+ else if(len || !ast->sample_size)
+ av_add_index_entry(st, pos, ast->cum_len, len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
+ ast->cum_len += get_duration(ast, len);
+ last_pos= pos;
}
return 0;
}
+static int guess_ni_flag(AVFormatContext *s){
+ int i;
+ int64_t last_start=0;
+ int64_t first_end= INT64_MAX;
+ int64_t oldpos= avio_tell(s->pb);
+
+ for(i=0; i<s->nb_streams; i++){
+ AVStream *st = s->streams[i];
+ int n= st->nb_index_entries;
+ unsigned int size;
+
+ if(n <= 0)
+ continue;
+
+ if(n >= 2){
+ int64_t pos= st->index_entries[0].pos;
+ avio_seek(s->pb, pos + 4, SEEK_SET);
+ size= avio_rl32(s->pb);
+ if(pos + size > st->index_entries[1].pos)
+ last_start= INT64_MAX;
+ }
+
+ if(st->index_entries[0].pos > last_start)
+ last_start= st->index_entries[0].pos;
+ if(st->index_entries[n-1].pos < first_end)
+ first_end= st->index_entries[n-1].pos;
+ }
+ avio_seek(s->pb, oldpos, SEEK_SET);
+ return last_start > first_end;
+}
+
static int avi_load_index(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
uint32_t tag, size;
- offset_t pos= url_ftell(pb);
-
- url_fseek(pb, avi->movi_end, SEEK_SET);
+ int64_t pos= avio_tell(pb);
+ int ret = -1;
+
+ if (avio_seek(pb, avi->movi_end, SEEK_SET) < 0)
+ goto the_end; // maybe truncated file
#ifdef DEBUG_SEEK
- printf("movi_end=0x%llx\n", avi->movi_end);
+ printf("movi_end=0x%"PRIx64"\n", avi->movi_end);
#endif
for(;;) {
- if (url_feof(pb))
+ if (pb->eof_reached)
break;
- tag = get_le32(pb);
- size = get_le32(pb);
+ tag = avio_rl32(pb);
+ size = avio_rl32(pb);
#ifdef DEBUG_SEEK
printf("tag=%c%c%c%c size=0x%x\n",
tag & 0xff,
case MKTAG('i', 'd', 'x', '1'):
if (avi_read_idx1(s, size) < 0)
goto skip;
- else
+ ret = 0;
goto the_end;
break;
default:
skip:
size += (size & 1);
- url_fskip(pb, size);
+ if (avio_skip(pb, size) < 0)
+ goto the_end; // something is wrong here
break;
}
}
the_end:
- url_fseek(pb, pos, SEEK_SET);
- return 0;
+ avio_seek(pb, pos, SEEK_SET);
+ return ret;
}
-/* return the index entry whose position is immediately >= 'wanted_pos' */
-static int locate_frame_in_index(AVIIndexEntry *entries,
- int nb_entries, int wanted_pos)
+static void seek_subtitle(AVStream *st, AVStream *st2, int64_t timestamp)
{
- int a, b, m, pos;
-
- a = 0;
- b = nb_entries - 1;
- while (a <= b) {
- m = (a + b) >> 1;
- pos = entries[m].pos;
- if (pos == wanted_pos)
- goto found;
- else if (pos > wanted_pos) {
- b = m - 1;
- } else {
- a = m + 1;
- }
- }
- m = a;
- if (m > 0)
- m--;
- found:
- return m;
+ AVIStream *ast2 = st2->priv_data;
+ int64_t ts2 = av_rescale_q(timestamp, st->time_base, st2->time_base);
+ av_free_packet(&ast2->sub_pkt);
+ if (avformat_seek_file(ast2->sub_ctx, 0, INT64_MIN, ts2, ts2, 0) >= 0 ||
+ avformat_seek_file(ast2->sub_ctx, 0, ts2, ts2, INT64_MAX, 0) >= 0)
+ av_read_packet(ast2->sub_ctx, &ast2->sub_pkt);
}
static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
{
AVIContext *avi = s->priv_data;
AVStream *st;
- AVIStream *ast;
- int frame_number, i;
+ int i, index;
int64_t pos;
+ AVIStream *ast;
if (!avi->index_loaded) {
/* we only load the index on demand */
avi_load_index(s);
avi->index_loaded = 1;
}
- if (stream_index < 0) {
- for(i = 0; i < s->nb_streams; i++) {
- st = s->streams[i];
- if (st->codec.codec_type == CODEC_TYPE_VIDEO)
- goto found;
- }
- return -1;
- found:
- stream_index = i;
- }
+ assert(stream_index>= 0);
st = s->streams[stream_index];
- if (st->codec.codec_type != CODEC_TYPE_VIDEO)
- return -1;
- ast = st->priv_data;
- /* compute the frame number */
- frame_number = timestamp;
-#ifdef DEBUG_SEEK
- printf("timestamp=%0.3f nb_indexes=%d frame_number=%d\n",
- (double)timestamp / AV_TIME_BASE,
- ast->nb_index_entries, frame_number);
-#endif
- /* find a closest key frame before */
- if (frame_number >= ast->nb_index_entries)
- return -1;
- while (frame_number >= 0 &&
- !(ast->index_entries[frame_number].flags & AVIIF_INDEX))
- frame_number--;
- if (frame_number < 0)
+ ast= st->priv_data;
+ index= av_index_search_timestamp(st, timestamp * FFMAX(ast->sample_size, 1), flags);
+ if(index<0)
return -1;
- ast->new_frame_offset = frame_number;
/* find the position */
- pos = ast->index_entries[frame_number].pos;
+ pos = st->index_entries[index].pos;
+ timestamp = st->index_entries[index].timestamp / FFMAX(ast->sample_size, 1);
-#ifdef DEBUG_SEEK
- printf("key_frame_number=%d pos=0x%llx\n",
- frame_number, pos);
-#endif
-
- /* update the frame counters for all the other stream by looking
- at the positions just after the one found */
- for(i = 0; i < s->nb_streams; i++) {
- int j;
- if (i != stream_index) {
- st = s->streams[i];
- ast = st->priv_data;
- if (ast->nb_index_entries <= 0)
- return -1;
- j = locate_frame_in_index(ast->index_entries,
- ast->nb_index_entries,
- pos);
- /* get next frame */
- if ((j + 1) < ast->nb_index_entries)
- j++;
- /* extract the current frame number */
- if (ast->sample_size==0)
- ast->new_frame_offset = j;
- else
- ast->new_frame_offset = ast->index_entries[j].cum_len;
- }
+// av_log(s, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
+
+ if (CONFIG_DV_DEMUXER && avi->dv_demux) {
+ /* One and only one real stream for DV in AVI, and it has video */
+ /* 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 synthesize correct timestamps. */
+ dv_offset_reset(avi->dv_demux, timestamp);
+
+ avio_seek(s->pb, pos, SEEK_SET);
+ avi->stream_index= -1;
+ return 0;
}
-
- /* everything is OK now. We can update the frame offsets */
+
for(i = 0; i < s->nb_streams; i++) {
- st = s->streams[i];
- ast = st->priv_data;
- ast->frame_offset = ast->new_frame_offset;
-#ifdef DEBUG_SEEK
- printf("%d: frame_offset=%d\n", i,
- ast->frame_offset);
-#endif
+ AVStream *st2 = s->streams[i];
+ AVIStream *ast2 = st2->priv_data;
+
+ ast2->packet_size=
+ ast2->remaining= 0;
+
+ if (ast2->sub_ctx) {
+ seek_subtitle(st, st2, timestamp);
+ continue;
+ }
+
+ if (st2->nb_index_entries <= 0)
+ continue;
+
+// assert(st2->codec->block_align);
+ 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_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1),
+ flags | AVSEEK_FLAG_BACKWARD);
+ if(index<0)
+ index=0;
+
+ if(!avi->non_interleaved){
+ while(index>0 && st2->index_entries[index].pos > pos)
+ index--;
+ while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
+ index++;
+ }
+
+// av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
+ /* extract the current frame number */
+ ast2->frame_offset = st2->index_entries[index].timestamp;
}
- if (avi->dv_demux)
- dv_flush_audio_packets(avi->dv_demux);
+
/* do the seek */
- pos += avi->movi_list;
- url_fseek(&s->pb, pos, SEEK_SET);
+ avio_seek(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;
- if(ast){
- av_free(ast->index_entries);
- av_free(ast);
+ if (ast) {
+ if (ast->sub_ctx) {
+ av_freep(&ast->sub_ctx->pb);
+ av_close_input_stream(ast->sub_ctx);
+ }
+ av_free(ast->sub_buffer);
+ av_free_packet(&ast->sub_pkt);
}
- av_free(st->codec.extradata);
- av_free(st->codec.palctrl);
}
- if (avi->dv_demux)
- av_free(avi->dv_demux);
+ av_free(avi->dv_demux);
return 0;
}
static int avi_probe(AVProbeData *p)
{
+ int i;
+
/* check file header */
- if (p->buf_size <= 32)
- return 0;
- 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] == ' ')
- 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;
}
-static AVInputFormat avi_iformat = {
+AVInputFormat ff_avi_demuxer = {
"avi",
- "avi format",
+ NULL_IF_CONFIG_SMALL("AVI format"),
sizeof(AVIContext),
avi_probe,
avi_read_header,
avi_read_close,
avi_read_seek,
};
-
-int avidec_init(void)
-{
- av_register_input_format(&avi_iformat);
- return 0;
-}
projects / ffmpeg / blobdiff