mirror of
https://github.com/FFmpeg/FFmpeg.git
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976a8b2179
* qatar/master: (40 commits) H.264: template left MB handling H.264: faster fill_decode_caches H.264: faster write_back_* H.264: faster fill_filter_caches H.264: make filter_mb_fast support the case of unavailable top mb Do not include log.h in avutil.h Do not include pixfmt.h in avutil.h Do not include rational.h in avutil.h Do not include mathematics.h in avutil.h Do not include intfloat_readwrite.h in avutil.h Remove return statements following infinite loops without break RTSP: Doxygen comment cleanup doxygen: Escape '\' in Doxygen documentation. md5: cosmetics md5: use AV_WL32 to write result md5: add fate test md5: include correct headers md5: fix test program doxygen: Drop array size declarations from Doxygen parameter names. doxygen: Fix parameter names to match the function prototypes. ... Conflicts: libavcodec/x86/dsputil_mmx.c libavformat/flvenc.c libavformat/oggenc.c libavformat/wtv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
1459 lines
49 KiB
C
1459 lines
49 KiB
C
/*
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* AVI demuxer
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* Copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <strings.h>
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/bswap.h"
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#include "libavutil/opt.h"
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#include "libavutil/dict.h"
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#include "avformat.h"
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#include "avi.h"
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#include "dv.h"
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#include "riff.h"
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#undef NDEBUG
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#include <assert.h>
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typedef struct AVIStream {
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int64_t frame_offset; /* current frame (video) or byte (audio) counter
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(used to compute the pts) */
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int remaining;
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int packet_size;
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int scale;
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int rate;
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int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
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int64_t cum_len; /* temporary storage (used during seek) */
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int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
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int prefix_count;
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uint32_t pal[256];
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int has_pal;
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int dshow_block_align; ///< block align variable used to emulate bugs in the MS dshow demuxer
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AVFormatContext *sub_ctx;
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AVPacket sub_pkt;
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uint8_t *sub_buffer;
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int64_t seek_pos;
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} AVIStream;
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typedef struct {
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const AVClass *class;
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int64_t riff_end;
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int64_t movi_end;
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int64_t fsize;
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int64_t movi_list;
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int64_t last_pkt_pos;
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int index_loaded;
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int is_odml;
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int non_interleaved;
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int stream_index;
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DVDemuxContext* dv_demux;
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int odml_depth;
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int use_odml;
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#define MAX_ODML_DEPTH 1000
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} AVIContext;
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static const AVOption options[] = {
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{ "use_odml", "use odml index", offsetof(AVIContext, use_odml), FF_OPT_TYPE_INT, 1, -1, 1, AV_OPT_FLAG_DECODING_PARAM},
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{ NULL },
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};
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static const AVClass demuxer_class = {
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"AVI demuxer",
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av_default_item_name,
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options,
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LIBAVUTIL_VERSION_INT,
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};
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static const char avi_headers[][8] = {
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{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' },
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{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
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{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19},
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{ 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' },
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{ 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' },
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{ 0 }
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};
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static int avi_load_index(AVFormatContext *s);
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static int guess_ni_flag(AVFormatContext *s);
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#define print_tag(str, tag, size) \
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av_dlog(NULL, "%s: tag=%c%c%c%c size=0x%x\n", \
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str, tag & 0xff, \
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(tag >> 8) & 0xff, \
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(tag >> 16) & 0xff, \
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(tag >> 24) & 0xff, \
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size)
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static inline int get_duration(AVIStream *ast, int len){
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if(ast->sample_size){
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return len;
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}else if (ast->dshow_block_align){
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return (len + ast->dshow_block_align - 1)/ast->dshow_block_align;
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}else
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return 1;
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}
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static int get_riff(AVFormatContext *s, AVIOContext *pb)
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{
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AVIContext *avi = s->priv_data;
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char header[8];
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int i;
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/* check RIFF header */
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avio_read(pb, header, 4);
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avi->riff_end = avio_rl32(pb); /* RIFF chunk size */
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avi->riff_end += avio_tell(pb); /* RIFF chunk end */
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avio_read(pb, header+4, 4);
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for(i=0; avi_headers[i][0]; i++)
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if(!memcmp(header, avi_headers[i], 8))
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break;
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if(!avi_headers[i][0])
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return -1;
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if(header[7] == 0x19)
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av_log(s, AV_LOG_INFO, "This file has been generated by a totally broken muxer.\n");
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return 0;
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}
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static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
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AVIContext *avi = s->priv_data;
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AVIOContext *pb = s->pb;
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int longs_pre_entry= avio_rl16(pb);
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int index_sub_type = avio_r8(pb);
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int index_type = avio_r8(pb);
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int entries_in_use = avio_rl32(pb);
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int chunk_id = avio_rl32(pb);
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int64_t base = avio_rl64(pb);
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int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0');
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AVStream *st;
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AVIStream *ast;
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int i;
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int64_t last_pos= -1;
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int64_t filesize= avio_size(s->pb);
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av_dlog(s, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64"\n",
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longs_pre_entry,index_type, entries_in_use, chunk_id, base);
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if(stream_id >= s->nb_streams || stream_id < 0)
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return -1;
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st= s->streams[stream_id];
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ast = st->priv_data;
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if(index_sub_type)
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return -1;
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avio_rl32(pb);
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if(index_type && longs_pre_entry != 2)
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return -1;
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if(index_type>1)
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return -1;
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if(filesize > 0 && base >= filesize){
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av_log(s, AV_LOG_ERROR, "ODML index invalid\n");
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if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF)
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base &= 0xFFFFFFFF;
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else
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return -1;
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}
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for(i=0; i<entries_in_use; i++){
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if(index_type){
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int64_t pos= avio_rl32(pb) + base - 8;
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int len = avio_rl32(pb);
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int key= len >= 0;
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len &= 0x7FFFFFFF;
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#ifdef DEBUG_SEEK
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av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
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#endif
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if(url_feof(pb))
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return -1;
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if(last_pos == pos || pos == base - 8)
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avi->non_interleaved= 1;
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if(last_pos != pos && (len || !ast->sample_size))
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av_add_index_entry(st, pos, ast->cum_len, len, 0, key ? AVINDEX_KEYFRAME : 0);
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ast->cum_len += get_duration(ast, len);
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last_pos= pos;
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}else{
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int64_t offset, pos;
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int duration;
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offset = avio_rl64(pb);
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avio_rl32(pb); /* size */
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duration = avio_rl32(pb);
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if(url_feof(pb))
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return -1;
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pos = avio_tell(pb);
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if(avi->odml_depth > MAX_ODML_DEPTH){
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av_log(s, AV_LOG_ERROR, "Too deeply nested ODML indexes\n");
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return -1;
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}
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avio_seek(pb, offset+8, SEEK_SET);
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avi->odml_depth++;
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read_braindead_odml_indx(s, frame_num);
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avi->odml_depth--;
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frame_num += duration;
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avio_seek(pb, pos, SEEK_SET);
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}
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}
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avi->index_loaded=1;
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return 0;
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}
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static void clean_index(AVFormatContext *s){
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int i;
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int64_t j;
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for(i=0; i<s->nb_streams; i++){
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AVStream *st = s->streams[i];
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AVIStream *ast = st->priv_data;
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int n= st->nb_index_entries;
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int max= ast->sample_size;
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int64_t pos, size, ts;
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if(n != 1 || ast->sample_size==0)
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continue;
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while(max < 1024) max+=max;
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pos= st->index_entries[0].pos;
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size= st->index_entries[0].size;
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ts= st->index_entries[0].timestamp;
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for(j=0; j<size; j+=max){
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av_add_index_entry(st, pos+j, ts+j, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME);
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}
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}
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}
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static int avi_read_tag(AVFormatContext *s, AVStream *st, uint32_t tag, uint32_t size)
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{
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AVIOContext *pb = s->pb;
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char key[5] = {0}, *value;
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size += (size & 1);
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if (size == UINT_MAX)
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return -1;
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value = av_malloc(size+1);
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if (!value)
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return -1;
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avio_read(pb, value, size);
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value[size]=0;
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AV_WL32(key, tag);
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return av_dict_set(st ? &st->metadata : &s->metadata, key, value,
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AV_DICT_DONT_STRDUP_VAL);
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}
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static void avi_read_info(AVFormatContext *s, uint64_t end)
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{
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while (avio_tell(s->pb) < end) {
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uint32_t tag = avio_rl32(s->pb);
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uint32_t size = avio_rl32(s->pb);
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avi_read_tag(s, NULL, tag, size);
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}
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}
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static const char months[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
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static void avi_metadata_creation_time(AVDictionary **metadata, char *date)
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{
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char month[4], time[9], buffer[64];
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int i, day, year;
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/* parse standard AVI date format (ie. "Mon Mar 10 15:04:43 2003") */
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if (sscanf(date, "%*3s%*[ ]%3s%*[ ]%2d%*[ ]%8s%*[ ]%4d",
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month, &day, time, &year) == 4) {
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for (i=0; i<12; i++)
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if (!strcasecmp(month, months[i])) {
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snprintf(buffer, sizeof(buffer), "%.4d-%.2d-%.2d %s",
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year, i+1, day, time);
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av_dict_set(metadata, "creation_time", buffer, 0);
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}
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} else if (date[4] == '/' && date[7] == '/') {
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date[4] = date[7] = '-';
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av_dict_set(metadata, "creation_time", date, 0);
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}
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}
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static void avi_read_nikon(AVFormatContext *s, uint64_t end)
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{
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while (avio_tell(s->pb) < end) {
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uint32_t tag = avio_rl32(s->pb);
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uint32_t size = avio_rl32(s->pb);
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switch (tag) {
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case MKTAG('n', 'c', 't', 'g'): { /* Nikon Tags */
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uint64_t tag_end = avio_tell(s->pb) + size;
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while (avio_tell(s->pb) < tag_end) {
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uint16_t tag = avio_rl16(s->pb);
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uint16_t size = avio_rl16(s->pb);
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const char *name = NULL;
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char buffer[64] = {0};
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size -= avio_read(s->pb, buffer,
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FFMIN(size, sizeof(buffer)-1));
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switch (tag) {
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case 0x03: name = "maker"; break;
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case 0x04: name = "model"; break;
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case 0x13: name = "creation_time";
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if (buffer[4] == ':' && buffer[7] == ':')
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buffer[4] = buffer[7] = '-';
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break;
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}
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if (name)
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av_dict_set(&s->metadata, name, buffer, 0);
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avio_skip(s->pb, size);
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}
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break;
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}
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default:
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avio_skip(s->pb, size);
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break;
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}
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}
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}
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static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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AVIContext *avi = s->priv_data;
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AVIOContext *pb = s->pb;
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unsigned int tag, tag1, handler;
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int codec_type, stream_index, frame_period;
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unsigned int size;
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int i;
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AVStream *st;
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AVIStream *ast = NULL;
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int avih_width=0, avih_height=0;
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int amv_file_format=0;
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uint64_t list_end = 0;
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int ret;
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|
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avi->stream_index= -1;
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if (get_riff(s, pb) < 0)
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return -1;
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|
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av_log(avi, AV_LOG_DEBUG, "use odml:%d\n", avi->use_odml);
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|
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avi->fsize = avio_size(pb);
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if(avi->fsize<=0)
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avi->fsize= avi->riff_end == 8 ? INT64_MAX : avi->riff_end;
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|
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/* first list tag */
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stream_index = -1;
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codec_type = -1;
|
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frame_period = 0;
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for(;;) {
|
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if (url_feof(pb))
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goto fail;
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tag = avio_rl32(pb);
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size = avio_rl32(pb);
|
|
|
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print_tag("tag", tag, size);
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|
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switch(tag) {
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case MKTAG('L', 'I', 'S', 'T'):
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list_end = avio_tell(pb) + size;
|
|
/* Ignored, except at start of video packets. */
|
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tag1 = avio_rl32(pb);
|
|
|
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print_tag("list", tag1, 0);
|
|
|
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if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
|
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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;
|
|
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 */
|
|
/* using frame_period is bad idea */
|
|
frame_period = avio_rl32(pb);
|
|
avio_rl32(pb); /* max. bytes per second */
|
|
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;
|
|
|
|
ast = av_mallocz(sizeof(AVIStream));
|
|
if (!ast)
|
|
goto fail;
|
|
st->priv_data = ast;
|
|
}
|
|
if(amv_file_format)
|
|
tag1 = stream_index ? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
|
|
|
|
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;
|
|
}
|
|
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;
|
|
}
|
|
|
|
assert(stream_index < s->nb_streams);
|
|
st->codec->stream_codec_tag= handler;
|
|
|
|
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'):
|
|
codec_type = AVMEDIA_TYPE_SUBTITLE;
|
|
break;
|
|
case MKTAG('d', 'a', 't', 's'):
|
|
codec_type = AVMEDIA_TYPE_DATA;
|
|
break;
|
|
default:
|
|
av_log(s, AV_LOG_INFO, "unknown stream type %X\n", tag1);
|
|
}
|
|
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 >= (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 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 FFmpeg. */
|
|
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_RL32(pal_src+4*i);
|
|
#else
|
|
memcpy(ast->pal, pal_src, pal_size);
|
|
#endif
|
|
ast->has_pal = 1;
|
|
}
|
|
|
|
print_tag("video", tag1, 0);
|
|
|
|
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 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->request_probe= 1;
|
|
break;
|
|
default:
|
|
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) && avi->use_odml){
|
|
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);
|
|
avio_skip(pb, size);
|
|
break;
|
|
}
|
|
}
|
|
end_of_header:
|
|
/* check stream number */
|
|
if (stream_index != s->nb_streams - 1) {
|
|
fail:
|
|
return -1;
|
|
}
|
|
|
|
if(!avi->index_loaded && pb->seekable)
|
|
avi_load_index(s);
|
|
avi->index_loaded = 1;
|
|
avi->non_interleaved |= guess_ni_flag(s) | (s->flags & AVFMT_FLAG_SORT_DTS);
|
|
for(i=0; i<s->nb_streams; i++){
|
|
AVStream *st = s->streams[i];
|
|
if(st->nb_index_entries)
|
|
break;
|
|
}
|
|
// DV-in-AVI cannot be non-interleaved, if set this must be
|
|
// a mis-detection.
|
|
if(avi->dv_demux)
|
|
avi->non_interleaved=0;
|
|
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_dict_set(&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 (!(ast->sub_ctx = avformat_alloc_context()))
|
|
goto error;
|
|
|
|
ast->sub_ctx->pb = pb;
|
|
if (!avformat_open_input(&ast->sub_ctx, "", 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_sync(AVFormatContext *s, int exit_early)
|
|
{
|
|
AVIContext *avi = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int n, d[8];
|
|
unsigned int size;
|
|
int64_t i, sync;
|
|
|
|
start_sync:
|
|
memset(d, -1, sizeof(int)*8);
|
|
for(i=sync=avio_tell(pb); !url_feof(pb); i++) {
|
|
int j;
|
|
|
|
for(j=0; j<7; j++)
|
|
d[j]= d[j+1];
|
|
d[7]= avio_r8(pb);
|
|
|
|
size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24);
|
|
|
|
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')
|
|
||(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 start_sync;
|
|
}
|
|
|
|
//parse stray LIST
|
|
if(d[0] == 'L' && d[1] == 'I' && d[2] == 'S' && d[3] == 'T'){
|
|
avio_skip(pb, 4);
|
|
goto start_sync;
|
|
}
|
|
|
|
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 start_sync;
|
|
}
|
|
|
|
//parse ##dc/##wb
|
|
if(n < s->nb_streams){
|
|
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 == 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( (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){
|
|
if (!exit_early) {
|
|
ast->frame_offset += get_duration(ast, size);
|
|
}
|
|
avio_skip(pb, size);
|
|
goto start_sync;
|
|
}
|
|
|
|
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 start_sync;
|
|
} 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')*/) {
|
|
|
|
if (exit_early)
|
|
return 0;
|
|
//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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return AVERROR_EOF;
|
|
}
|
|
|
|
static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVIContext *avi = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int err;
|
|
void* dstr;
|
|
|
|
if (CONFIG_DV_DEMUXER && avi->dv_demux) {
|
|
int size = dv_get_packet(avi->dv_demux, pkt);
|
|
if (size >= 0)
|
|
return size;
|
|
}
|
|
|
|
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->pos);
|
|
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 (index == st->nb_index_entries-1){
|
|
int key=1;
|
|
int i;
|
|
uint32_t state=-1;
|
|
for(i=0; i<FFMIN(size,256); i++){
|
|
if(st->codec->codec_id == CODEC_ID_MPEG4){
|
|
if(state == 0x1B6){
|
|
key= !(pkt->data[i]&0xC0);
|
|
break;
|
|
}
|
|
}else
|
|
break;
|
|
state= (state<<8) + pkt->data[i];
|
|
}
|
|
if(!key)
|
|
e->flags &= ~AVINDEX_KEYFRAME;
|
|
}
|
|
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;
|
|
}
|
|
|
|
if(!avi->non_interleaved && pkt->pos >= 0 && ast->seek_pos > pkt->pos){
|
|
av_free_packet(pkt);
|
|
goto resync;
|
|
}
|
|
ast->seek_pos= 0;
|
|
|
|
return size;
|
|
}
|
|
|
|
if ((err = avi_sync(s, 0)) < 0)
|
|
return err;
|
|
goto resync;
|
|
}
|
|
|
|
/* 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;
|
|
AVIOContext *pb = s->pb;
|
|
int nb_index_entries, i;
|
|
AVStream *st;
|
|
AVIStream *ast;
|
|
unsigned int index, tag, flags, pos, len, first_packet = 1;
|
|
unsigned last_pos= -1;
|
|
int64_t idx1_pos, first_packet_pos = 0, data_offset = 0;
|
|
|
|
nb_index_entries = size / 16;
|
|
if (nb_index_entries <= 0)
|
|
return -1;
|
|
|
|
idx1_pos = avio_tell(pb);
|
|
avio_seek(pb, avi->movi_list+4, SEEK_SET);
|
|
if (avi_sync(s, 1) == 0) {
|
|
first_packet_pos = avio_tell(pb) - 8;
|
|
}
|
|
avi->stream_index = -1;
|
|
avio_seek(pb, idx1_pos, SEEK_SET);
|
|
|
|
/* Read the entries and sort them in each stream component. */
|
|
for(i = 0; i < nb_index_entries; i++) {
|
|
tag = avio_rl32(pb);
|
|
flags = avio_rl32(pb);
|
|
pos = avio_rl32(pb);
|
|
len = avio_rl32(pb);
|
|
av_dlog(s, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
|
|
i, tag, flags, pos, len);
|
|
|
|
index = ((tag & 0xff) - '0') * 10;
|
|
index += ((tag >> 8) & 0xff) - '0';
|
|
if (index >= s->nb_streams)
|
|
continue;
|
|
st = s->streams[index];
|
|
ast = st->priv_data;
|
|
|
|
if(first_packet && first_packet_pos && len) {
|
|
data_offset = first_packet_pos - pos;
|
|
first_packet = 0;
|
|
}
|
|
pos += data_offset;
|
|
|
|
av_dlog(s, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
|
|
|
|
if(url_feof(pb))
|
|
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;
|
|
AVIOContext *pb = s->pb;
|
|
uint32_t tag, size;
|
|
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
|
|
av_dlog(s, "movi_end=0x%"PRIx64"\n", avi->movi_end);
|
|
for(;;) {
|
|
if (url_feof(pb))
|
|
break;
|
|
tag = avio_rl32(pb);
|
|
size = avio_rl32(pb);
|
|
av_dlog(s, "tag=%c%c%c%c size=0x%x\n",
|
|
tag & 0xff,
|
|
(tag >> 8) & 0xff,
|
|
(tag >> 16) & 0xff,
|
|
(tag >> 24) & 0xff,
|
|
size);
|
|
|
|
if (tag == MKTAG('i', 'd', 'x', '1') &&
|
|
avi_read_idx1(s, size) >= 0) {
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
size += (size & 1);
|
|
if (avio_skip(pb, size) < 0)
|
|
break; // something is wrong here
|
|
}
|
|
the_end:
|
|
avio_seek(pb, pos, SEEK_SET);
|
|
return ret;
|
|
}
|
|
|
|
static void seek_subtitle(AVStream *st, AVStream *st2, int64_t timestamp)
|
|
{
|
|
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;
|
|
int i, index;
|
|
int64_t pos, pos_min;
|
|
AVIStream *ast;
|
|
|
|
if (!avi->index_loaded) {
|
|
/* we only load the index on demand */
|
|
avi_load_index(s);
|
|
avi->index_loaded = 1;
|
|
}
|
|
assert(stream_index>= 0);
|
|
|
|
st = s->streams[stream_index];
|
|
ast= st->priv_data;
|
|
index= av_index_search_timestamp(st, timestamp * FFMAX(ast->sample_size, 1), flags);
|
|
if(index<0)
|
|
return -1;
|
|
|
|
/* find the position */
|
|
pos = st->index_entries[index].pos;
|
|
timestamp = st->index_entries[index].timestamp / FFMAX(ast->sample_size, 1);
|
|
|
|
// 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;
|
|
}
|
|
|
|
pos_min= pos;
|
|
for(i = 0; i < s->nb_streams; i++) {
|
|
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 | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0));
|
|
if(index<0)
|
|
index=0;
|
|
ast2->seek_pos= st2->index_entries[index].pos;
|
|
pos_min= FFMIN(pos_min,ast2->seek_pos);
|
|
}
|
|
for(i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st2 = s->streams[i];
|
|
AVIStream *ast2 = st2->priv_data;
|
|
|
|
if (ast2->sub_ctx || st2->nb_index_entries <= 0)
|
|
continue;
|
|
|
|
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 | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0));
|
|
if(index<0)
|
|
index=0;
|
|
while(index>0 && st2->index_entries[index-1].pos >= pos_min)
|
|
index--;
|
|
ast2->frame_offset = st2->index_entries[index].timestamp;
|
|
}
|
|
|
|
/* do the seek */
|
|
avio_seek(s->pb, pos_min, SEEK_SET);
|
|
avi->stream_index= -1;
|
|
return 0;
|
|
}
|
|
|
|
static int avi_read_close(AVFormatContext *s)
|
|
{
|
|
int i;
|
|
AVIContext *avi = s->priv_data;
|
|
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
AVStream *st = s->streams[i];
|
|
AVIStream *ast = st->priv_data;
|
|
if (ast) {
|
|
if (ast->sub_ctx) {
|
|
av_freep(&ast->sub_ctx->pb);
|
|
av_close_input_file(ast->sub_ctx);
|
|
}
|
|
av_free(ast->sub_buffer);
|
|
av_free_packet(&ast->sub_pkt);
|
|
}
|
|
}
|
|
|
|
av_free(avi->dv_demux);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int avi_probe(AVProbeData *p)
|
|
{
|
|
int i;
|
|
|
|
/* check file header */
|
|
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 ff_avi_demuxer = {
|
|
"avi",
|
|
NULL_IF_CONFIG_SMALL("AVI format"),
|
|
sizeof(AVIContext),
|
|
avi_probe,
|
|
avi_read_header,
|
|
avi_read_packet,
|
|
avi_read_close,
|
|
avi_read_seek,
|
|
.priv_class = &demuxer_class,
|
|
};
|