diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/nsvdec.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/nsvdec.c | 765 |
1 files changed, 0 insertions, 765 deletions
diff --git a/contrib/ffmpeg/libavformat/nsvdec.c b/contrib/ffmpeg/libavformat/nsvdec.c deleted file mode 100644 index 2753edbd9..000000000 --- a/contrib/ffmpeg/libavformat/nsvdec.c +++ /dev/null @@ -1,765 +0,0 @@ -/* - * NSV demuxer - * Copyright (c) 2004 The FFmpeg Project. - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "avformat.h" -#include "riff.h" - -//#define DEBUG -//#define DEBUG_DUMP_INDEX // XXX dumbdriving-271.nsv breaks with it commented!! -//#define DEBUG_SEEK -#define CHECK_SUBSEQUENT_NSVS -//#define DISABLE_AUDIO - -/* max bytes to crawl for trying to resync - * stupid streaming servers don't start at chunk boundaries... - */ -#define NSV_MAX_RESYNC (500*1024) -#define NSV_MAX_RESYNC_TRIES 300 - -/* - * First version by Francois Revol - revol@free.fr - * References: - * (1) http://www.multimedia.cx/nsv-format.txt - * seems someone came to the same conclusions as me, and updated it: - * (2) http://www.stud.ktu.lt/~vitslav/nsv/nsv-format.txt - * http://www.stud.ktu.lt/~vitslav/nsv/ - * official docs - * (3) http://ultravox.aol.com/NSVFormat.rtf - * Sample files: - * (S1) http://www.nullsoft.com/nsv/samples/ - * http://www.nullsoft.com/nsv/samples/faster.nsv - * http://streamripper.sourceforge.net/openbb/read.php?TID=492&page=4 - */ - -/* - * notes on the header (Francois Revol): - * - * It is followed by strings, then a table, but nothing tells - * where the table begins according to (1). After checking faster.nsv, - * I believe NVSf[16-19] gives the size of the strings data - * (that is the offset of the data table after the header). - * After checking all samples from (S1) all confirms this. - * - * Then, about NSVf[12-15], faster.nsf has 179700. When veiwing it in VLC, - * I noticed there was about 1 NVSs chunk/s, so I ran - * strings faster.nsv | grep NSVs | wc -l - * which gave me 180. That leads me to think that NSVf[12-15] might be the - * file length in milliseconds. - * Let's try that: - * for f in *.nsv; do HTIME="$(od -t x4 "$f" | head -1 | sed 's/.* //')"; echo "'$f' $((0x$HTIME))s = $((0x$HTIME/1000/60)):$((0x$HTIME/1000%60))"; done - * except for nstrailer (which doesn't have an NSVf header), it repports correct time. - * - * nsvtrailer.nsv (S1) does not have any NSVf header, only NSVs chunks, - * so the header seems to not be mandatory. (for streaming). - * - * index slice duration check (excepts nsvtrailer.nsv): - * for f in [^n]*.nsv; do DUR="$(ffmpeg -i "$f" 2>/dev/null | grep 'NSVf duration' | cut -d ' ' -f 4)"; IC="$(ffmpeg -i "$f" 2>/dev/null | grep 'INDEX ENTRIES' | cut -d ' ' -f 2)"; echo "duration $DUR, slite time $(($DUR/$IC))"; done - */ - -/* - * TODO: - * - handle timestamps !!! - * - use index - * - mime-type in probe() - * - seek - */ - -#ifdef DEBUG -#define PRINT(_v) printf _v -#else -#define PRINT(_v) -#endif - -#if 0 -struct NSVf_header { - uint32_t chunk_tag; /* 'NSVf' */ - uint32_t chunk_size; - uint32_t file_size; /* max 4GB ??? noone learns anything it seems :^) */ - uint32_t file_length; //unknown1; /* what about MSB of file_size ? */ - uint32_t info_strings_size; /* size of the info strings */ //unknown2; - uint32_t table_entries; - uint32_t table_entries_used; /* the left ones should be -1 */ -}; - -struct NSVs_header { - uint32_t chunk_tag; /* 'NSVs' */ - uint32_t v4cc; /* or 'NONE' */ - uint32_t a4cc; /* or 'NONE' */ - uint16_t vwidth; /* assert(vwidth%16==0) */ - uint16_t vheight; /* assert(vheight%16==0) */ - uint8_t framerate; /* value = (framerate&0x80)?frtable[frameratex0x7f]:framerate */ - uint16_t unknown; -}; - -struct nsv_avchunk_header { - uint8_t vchunk_size_lsb; - uint16_t vchunk_size_msb; /* value = (vchunk_size_msb << 4) | (vchunk_size_lsb >> 4) */ - uint16_t achunk_size; -}; - -struct nsv_pcm_header { - uint8_t bits_per_sample; - uint8_t channel_count; - uint16_t sample_rate; -}; -#endif - -/* variation from avi.h */ -/*typedef struct CodecTag { - int id; - unsigned int tag; -} CodecTag;*/ - -/* tags */ - -#define T_NSVF MKTAG('N', 'S', 'V', 'f') /* file header */ -#define T_NSVS MKTAG('N', 'S', 'V', 's') /* chunk header */ -#define T_TOC2 MKTAG('T', 'O', 'C', '2') /* extra index marker */ -#define T_NONE MKTAG('N', 'O', 'N', 'E') /* null a/v 4CC */ -#define T_SUBT MKTAG('S', 'U', 'B', 'T') /* subtitle aux data */ -#define T_ASYN MKTAG('A', 'S', 'Y', 'N') /* async a/v aux marker */ -#define T_KEYF MKTAG('K', 'E', 'Y', 'F') /* video keyframe aux marker (addition) */ - -#define TB_NSVF MKBETAG('N', 'S', 'V', 'f') -#define TB_NSVS MKBETAG('N', 'S', 'V', 's') - -/* hardcoded stream indices */ -#define NSV_ST_VIDEO 0 -#define NSV_ST_AUDIO 1 -#define NSV_ST_SUBT 2 - -enum NSVStatus { - NSV_UNSYNC, - NSV_FOUND_NSVF, - NSV_HAS_READ_NSVF, - NSV_FOUND_NSVS, - NSV_HAS_READ_NSVS, - NSV_FOUND_BEEF, - NSV_GOT_VIDEO, - NSV_GOT_AUDIO, -}; - -typedef struct NSVStream { - int frame_offset; /* current frame (video) or byte (audio) counter - (used to compute the pts) */ - 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) */ -} NSVStream; - -typedef struct { - int base_offset; - int NSVf_end; - uint32_t *nsvf_index_data; - int index_entries; - enum NSVStatus state; - AVPacket ahead[2]; /* [v, a] if .data is !NULL there is something */ - /* cached */ - int64_t duration; - uint32_t vtag, atag; - uint16_t vwidth, vheight; - int16_t avsync; - //DVDemuxContext* dv_demux; -} NSVContext; - -static const AVCodecTag nsv_codec_video_tags[] = { - { CODEC_ID_VP3, MKTAG('V', 'P', '3', ' ') }, - { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') }, - { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, - { CODEC_ID_VP5, MKTAG('V', 'P', '5', ' ') }, - { CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') }, - { CODEC_ID_VP6, MKTAG('V', 'P', '6', ' ') }, - { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') }, - { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') }, - { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') }, -/* - { CODEC_ID_VP4, MKTAG('V', 'P', '4', ' ') }, - { CODEC_ID_VP4, MKTAG('V', 'P', '4', '0') }, -*/ - { CODEC_ID_XVID, MKTAG('X', 'V', 'I', 'D') }, /* cf sample xvid decoder from nsv_codec_sdk.zip */ - { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', '3') }, - { 0, 0 }, -}; - -static const AVCodecTag nsv_codec_audio_tags[] = { - { CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') }, - { CODEC_ID_AAC, MKTAG('A', 'A', 'C', ' ') }, - { CODEC_ID_AAC, MKTAG('A', 'A', 'C', 'P') }, /* _CUTTED__MUXED_2 Heads - Out Of The City.nsv */ - { CODEC_ID_PCM_U16LE, MKTAG('P', 'C', 'M', ' ') }, - { 0, 0 }, -}; - -//static int nsv_load_index(AVFormatContext *s); -static int nsv_read_chunk(AVFormatContext *s, int fill_header); - -#ifdef DEBUG -static void print_tag(const char *str, unsigned int tag, int size) -{ - printf("%s: tag=%c%c%c%c\n", - str, tag & 0xff, - (tag >> 8) & 0xff, - (tag >> 16) & 0xff, - (tag >> 24) & 0xff); -} -#endif - -/* try to find something we recognize, and set the state accordingly */ -static int nsv_resync(AVFormatContext *s) -{ - NSVContext *nsv = s->priv_data; - ByteIOContext *pb = &s->pb; - uint32_t v = 0; - int i; - - PRINT(("%s(), offset = %"PRId64", state = %d\n", __FUNCTION__, url_ftell(pb), nsv->state)); - - //nsv->state = NSV_UNSYNC; - - for (i = 0; i < NSV_MAX_RESYNC; i++) { - if (url_feof(pb)) { - PRINT(("NSV EOF\n")); - nsv->state = NSV_UNSYNC; - return -1; - } - v <<= 8; - v |= get_byte(pb); -/* - if (i < 8) { - PRINT(("NSV resync: [%d] = %02x\n", i, v & 0x0FF)); - } -*/ - - if ((v & 0x0000ffff) == 0xefbe) { /* BEEF */ - PRINT(("NSV resynced on BEEF after %d bytes\n", i+1)); - nsv->state = NSV_FOUND_BEEF; - return 0; - } - /* we read as big endian, thus the MK*BE* */ - if (v == TB_NSVF) { /* NSVf */ - PRINT(("NSV resynced on NSVf after %d bytes\n", i+1)); - nsv->state = NSV_FOUND_NSVF; - return 0; - } - if (v == MKBETAG('N', 'S', 'V', 's')) { /* NSVs */ - PRINT(("NSV resynced on NSVs after %d bytes\n", i+1)); - nsv->state = NSV_FOUND_NSVS; - return 0; - } - - } - PRINT(("NSV sync lost\n")); - return -1; -} - -static int nsv_parse_NSVf_header(AVFormatContext *s, AVFormatParameters *ap) -{ - NSVContext *nsv = s->priv_data; - ByteIOContext *pb = &s->pb; - unsigned int file_size, size; - int64_t duration; - int strings_size; - int table_entries; - int table_entries_used; - - PRINT(("%s()\n", __FUNCTION__)); - - nsv->state = NSV_UNSYNC; /* in case we fail */ - - size = get_le32(pb); - if (size < 28) - return -1; - nsv->NSVf_end = size; - - //s->file_size = (uint32_t)get_le32(pb); - file_size = (uint32_t)get_le32(pb); - PRINT(("NSV NSVf chunk_size %u\n", size)); - PRINT(("NSV NSVf file_size %u\n", file_size)); - - nsv->duration = duration = get_le32(pb); /* in ms */ - PRINT(("NSV NSVf duration %"PRId64" ms\n", duration)); - // XXX: store it in AVStreams - - strings_size = get_le32(pb); - table_entries = get_le32(pb); - table_entries_used = get_le32(pb); - PRINT(("NSV NSVf info-strings size: %d, table entries: %d, bis %d\n", - strings_size, table_entries, table_entries_used)); - if (url_feof(pb)) - return -1; - - PRINT(("NSV got header; filepos %"PRId64"\n", url_ftell(pb))); - - if (strings_size > 0) { - char *strings; /* last byte will be '\0' to play safe with str*() */ - char *p, *endp; - char *token, *value; - char quote; - - p = strings = av_mallocz(strings_size + 1); - endp = strings + strings_size; - get_buffer(pb, strings, strings_size); - while (p < endp) { - while (*p == ' ') - p++; /* strip out spaces */ - if (p >= endp-2) - break; - token = p; - p = strchr(p, '='); - if (!p || p >= endp-2) - break; - *p++ = '\0'; - quote = *p++; - value = p; - p = strchr(p, quote); - if (!p || p >= endp) - break; - *p++ = '\0'; - PRINT(("NSV NSVf INFO: %s='%s'\n", token, value)); - if (!strcmp(token, "ASPECT")) { - /* don't care */ - } else if (!strcmp(token, "CREATOR") || !strcmp(token, "Author")) { - strncpy(s->author, value, 512-1); - } else if (!strcmp(token, "Copyright")) { - strncpy(s->copyright, value, 512-1); - } else if (!strcmp(token, "TITLE") || !strcmp(token, "Title")) { - strncpy(s->title, value, 512-1); - } - } - av_free(strings); - } - if (url_feof(pb)) - return -1; - - PRINT(("NSV got infos; filepos %"PRId64"\n", url_ftell(pb))); - - if (table_entries_used > 0) { - nsv->index_entries = table_entries_used; - if((unsigned)table_entries >= UINT_MAX / sizeof(uint32_t)) - return -1; - nsv->nsvf_index_data = av_malloc(table_entries * sizeof(uint32_t)); -#warning "FIXME: Byteswap buffer as needed" - get_buffer(pb, (unsigned char *)nsv->nsvf_index_data, table_entries * sizeof(uint32_t)); - } - - PRINT(("NSV got index; filepos %"PRId64"\n", url_ftell(pb))); - -#ifdef DEBUG_DUMP_INDEX -#define V(v) ((v<0x20 || v > 127)?'.':v) - /* dump index */ - PRINT(("NSV %d INDEX ENTRIES:\n", table_entries)); - PRINT(("NSV [dataoffset][fileoffset]\n", table_entries)); - for (i = 0; i < table_entries; i++) { - unsigned char b[8]; - url_fseek(pb, size + nsv->nsvf_index_data[i], SEEK_SET); - get_buffer(pb, b, 8); - PRINT(("NSV [0x%08lx][0x%08lx]: %02x %02x %02x %02x %02x %02x %02x %02x" - "%c%c%c%c%c%c%c%c\n", - nsv->nsvf_index_data[i], size + nsv->nsvf_index_data[i], - b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], - V(b[0]), V(b[1]), V(b[2]), V(b[3]), V(b[4]), V(b[5]), V(b[6]), V(b[7]) )); - } - //url_fseek(pb, size, SEEK_SET); /* go back to end of header */ -#undef V -#endif - - url_fseek(pb, nsv->base_offset + size, SEEK_SET); /* required for dumbdriving-271.nsv (2 extra bytes) */ - - if (url_feof(pb)) - return -1; - nsv->state = NSV_HAS_READ_NSVF; - return 0; -} - -static int nsv_parse_NSVs_header(AVFormatContext *s, AVFormatParameters *ap) -{ - NSVContext *nsv = s->priv_data; - ByteIOContext *pb = &s->pb; - uint32_t vtag, atag; - uint16_t vwidth, vheight; - AVRational framerate; - int i; - AVStream *st; - NSVStream *nst; - PRINT(("%s()\n", __FUNCTION__)); - - vtag = get_le32(pb); - atag = get_le32(pb); - vwidth = get_le16(pb); - vheight = get_le16(pb); - i = get_byte(pb); - - PRINT(("NSV NSVs framerate code %2x\n", i)); - if(i&0x80) { /* odd way of giving native framerates from docs */ - int t=(i & 0x7F)>>2; - if(t<16) framerate = (AVRational){1, t+1}; - else framerate = (AVRational){t-15, 1}; - - if(i&1){ - framerate.num *= 1000; - framerate.den *= 1001; - } - - if((i&3)==3) framerate.num *= 24; - else if((i&3)==2) framerate.num *= 25; - else framerate.num *= 30; - } - else - framerate= (AVRational){i, 1}; - - nsv->avsync = get_le16(pb); -#ifdef DEBUG - print_tag("NSV NSVs vtag", vtag, 0); - print_tag("NSV NSVs atag", atag, 0); - PRINT(("NSV NSVs vsize %dx%d\n", vwidth, vheight)); -#endif - - /* XXX change to ap != NULL ? */ - if (s->nb_streams == 0) { /* streams not yet published, let's do that */ - nsv->vtag = vtag; - nsv->atag = atag; - nsv->vwidth = vwidth; - nsv->vheight = vwidth; - if (vtag != T_NONE) { - st = av_new_stream(s, NSV_ST_VIDEO); - if (!st) - goto fail; - - nst = av_mallocz(sizeof(NSVStream)); - if (!nst) - goto fail; - st->priv_data = nst; - st->codec->codec_type = CODEC_TYPE_VIDEO; - st->codec->codec_tag = vtag; - st->codec->codec_id = codec_get_id(nsv_codec_video_tags, vtag); - st->codec->width = vwidth; - st->codec->height = vheight; - st->codec->bits_per_sample = 24; /* depth XXX */ - - av_set_pts_info(st, 64, framerate.den, framerate.num); - st->start_time = 0; - st->duration = av_rescale(nsv->duration, framerate.num, 1000*framerate.den); - } - if (atag != T_NONE) { -#ifndef DISABLE_AUDIO - st = av_new_stream(s, NSV_ST_AUDIO); - if (!st) - goto fail; - - nst = av_mallocz(sizeof(NSVStream)); - if (!nst) - goto fail; - st->priv_data = nst; - st->codec->codec_type = CODEC_TYPE_AUDIO; - st->codec->codec_tag = atag; - st->codec->codec_id = codec_get_id(nsv_codec_audio_tags, atag); - - st->need_parsing = 1; /* for PCM we will read a chunk later and put correct info */ - - /* set timebase to common denominator of ms and framerate */ - av_set_pts_info(st, 64, 1, framerate.num*1000); - st->start_time = 0; - st->duration = (int64_t)nsv->duration * framerate.num; -#endif - } -#ifdef CHECK_SUBSEQUENT_NSVS - } else { - if (nsv->vtag != vtag || nsv->atag != atag || nsv->vwidth != vwidth || nsv->vheight != vwidth) { - PRINT(("NSV NSVs header values differ from the first one!!!\n")); - //return -1; - } -#endif /* CHECK_SUBSEQUENT_NSVS */ - } - - nsv->state = NSV_HAS_READ_NSVS; - return 0; -fail: - /* XXX */ - nsv->state = NSV_UNSYNC; - return -1; -} - -static int nsv_read_header(AVFormatContext *s, AVFormatParameters *ap) -{ - NSVContext *nsv = s->priv_data; - int i, err; - - PRINT(("%s()\n", __FUNCTION__)); - PRINT(("filename '%s'\n", s->filename)); - - nsv->state = NSV_UNSYNC; - nsv->ahead[0].data = nsv->ahead[1].data = NULL; - - for (i = 0; i < NSV_MAX_RESYNC_TRIES; i++) { - if (nsv_resync(s) < 0) - return -1; - if (nsv->state == NSV_FOUND_NSVF) - err = nsv_parse_NSVf_header(s, ap); - /* we need the first NSVs also... */ - if (nsv->state == NSV_FOUND_NSVS) { - err = nsv_parse_NSVs_header(s, ap); - break; /* we just want the first one */ - } - } - if (s->nb_streams < 1) /* no luck so far */ - return -1; - /* now read the first chunk, so we can attempt to decode more info */ - err = nsv_read_chunk(s, 1); - - PRINT(("parsed header\n")); - return 0; -} - -static int nsv_read_chunk(AVFormatContext *s, int fill_header) -{ - NSVContext *nsv = s->priv_data; - ByteIOContext *pb = &s->pb; - AVStream *st[2] = {NULL, NULL}; - NSVStream *nst; - AVPacket *pkt; - int i, err = 0; - uint8_t auxcount; /* number of aux metadata, also 4 bits of vsize */ - uint32_t vsize; - uint16_t asize; - uint16_t auxsize; - uint32_t auxtag; - - PRINT(("%s(%d)\n", __FUNCTION__, fill_header)); - - if (nsv->ahead[0].data || nsv->ahead[1].data) - return 0; //-1; /* hey! eat what you've in your plate first! */ - -null_chunk_retry: - if (url_feof(pb)) - return -1; - - for (i = 0; i < NSV_MAX_RESYNC_TRIES && nsv->state < NSV_FOUND_NSVS && !err; i++) - err = nsv_resync(s); - if (err < 0) - return err; - if (nsv->state == NSV_FOUND_NSVS) - err = nsv_parse_NSVs_header(s, NULL); - if (err < 0) - return err; - if (nsv->state != NSV_HAS_READ_NSVS && nsv->state != NSV_FOUND_BEEF) - return -1; - - auxcount = get_byte(pb); - vsize = get_le16(pb); - asize = get_le16(pb); - vsize = (vsize << 4) | (auxcount >> 4); - auxcount &= 0x0f; - PRINT(("NSV CHUNK %d aux, %u bytes video, %d bytes audio\n", auxcount, vsize, asize)); - /* skip aux stuff */ - for (i = 0; i < auxcount; i++) { - auxsize = get_le16(pb); - auxtag = get_le32(pb); - PRINT(("NSV aux data: '%c%c%c%c', %d bytes\n", - (auxtag & 0x0ff), - ((auxtag >> 8) & 0x0ff), - ((auxtag >> 16) & 0x0ff), - ((auxtag >> 24) & 0x0ff), - auxsize)); - url_fskip(pb, auxsize); - vsize -= auxsize + sizeof(uint16_t) + sizeof(uint32_t); /* that's becoming braindead */ - } - - if (url_feof(pb)) - return -1; - if (!vsize && !asize) { - nsv->state = NSV_UNSYNC; - goto null_chunk_retry; - } - - /* map back streams to v,a */ - if (s->streams[0]) - st[s->streams[0]->id] = s->streams[0]; - if (s->streams[1]) - st[s->streams[1]->id] = s->streams[1]; - - if (vsize/* && st[NSV_ST_VIDEO]*/) { - nst = st[NSV_ST_VIDEO]->priv_data; - pkt = &nsv->ahead[NSV_ST_VIDEO]; - av_get_packet(pb, pkt, vsize); - pkt->stream_index = st[NSV_ST_VIDEO]->index;//NSV_ST_VIDEO; - pkt->dts = nst->frame_offset; - pkt->flags |= nsv->state == NSV_HAS_READ_NSVS ? PKT_FLAG_KEY : 0; /* keyframe only likely on a sync frame */ -/* - for (i = 0; i < MIN(8, vsize); i++) - PRINT(("NSV video: [%d] = %02x\n", i, pkt->data[i])); -*/ - } - ((NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset++; - - if (asize/*st[NSV_ST_AUDIO]*/) { - nst = st[NSV_ST_AUDIO]->priv_data; - pkt = &nsv->ahead[NSV_ST_AUDIO]; - /* read raw audio specific header on the first audio chunk... */ - /* on ALL audio chunks ?? seems so! */ - if (asize && st[NSV_ST_AUDIO]->codec->codec_tag == MKTAG('P', 'C', 'M', ' ')/* && fill_header*/) { - uint8_t bps; - uint8_t channels; - uint16_t samplerate; - bps = get_byte(pb); - channels = get_byte(pb); - samplerate = get_le16(pb); - asize-=4; - PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate)); - if (fill_header) { - st[NSV_ST_AUDIO]->need_parsing = 0; /* we know everything */ - if (bps != 16) { - PRINT(("NSV AUDIO bit/sample != 16 (%d)!!!\n", bps)); - } - bps /= channels; // ??? - if (bps == 8) - st[NSV_ST_AUDIO]->codec->codec_id = CODEC_ID_PCM_U8; - samplerate /= 4;/* UGH ??? XXX */ - channels = 1; - st[NSV_ST_AUDIO]->codec->channels = channels; - st[NSV_ST_AUDIO]->codec->sample_rate = samplerate; - PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate)); - } - } - av_get_packet(pb, pkt, asize); - pkt->stream_index = st[NSV_ST_AUDIO]->index;//NSV_ST_AUDIO; - pkt->flags |= nsv->state == NSV_HAS_READ_NSVS ? PKT_FLAG_KEY : 0; /* keyframe only likely on a sync frame */ - if( nsv->state == NSV_HAS_READ_NSVS && st[NSV_ST_VIDEO] ) { - /* on a nsvs frame we have new information on a/v sync */ - pkt->dts = (((NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset-1); - pkt->dts *= (int64_t)1000 * st[NSV_ST_VIDEO]->time_base.num; - pkt->dts += (int64_t)nsv->avsync * st[NSV_ST_VIDEO]->time_base.den; - PRINT(("NSV AUDIO: sync:%d, dts:%"PRId64, nsv->avsync, pkt->dts)); - } - nst->frame_offset++; - } - - nsv->state = NSV_UNSYNC; - return 0; -} - - -static int nsv_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - NSVContext *nsv = s->priv_data; - int i, err = 0; - - PRINT(("%s()\n", __FUNCTION__)); - - /* in case we don't already have something to eat ... */ - if (nsv->ahead[0].data == NULL && nsv->ahead[1].data == NULL) - err = nsv_read_chunk(s, 0); - if (err < 0) - return err; - - /* now pick one of the plates */ - for (i = 0; i < 2; i++) { - if (nsv->ahead[i].data) { - PRINT(("%s: using cached packet[%d]\n", __FUNCTION__, i)); - /* avoid the cost of new_packet + memcpy(->data) */ - memcpy(pkt, &nsv->ahead[i], sizeof(AVPacket)); - nsv->ahead[i].data = NULL; /* we ate that one */ - return pkt->size; - } - } - - /* this restaurant is not approvisionned :^] */ - return -1; -} - -static int nsv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) -{ -#if 0 - NSVContext *avi = s->priv_data; - AVStream *st; - NSVStream *ast; - int frame_number, i; - int64_t pos; -#endif - - return -1; -} - -static int nsv_read_close(AVFormatContext *s) -{ -/* int i; */ - NSVContext *nsv = s->priv_data; - - if (nsv->index_entries) - av_free(nsv->nsvf_index_data); - -#if 0 - - for(i=0;i<s->nb_streams;i++) { - AVStream *st = s->streams[i]; - NSVStream *ast = st->priv_data; - if(ast){ - av_free(ast->index_entries); - av_free(ast); - } - av_free(st->codec->palctrl); - } - -#endif - return 0; -} - -static int nsv_probe(AVProbeData *p) -{ - int i; -// PRINT(("nsv_probe(), buf_size %d\n", p->buf_size)); - /* check file header */ - if (p->buf_size <= 32) - return 0; - if (p->buf[0] == 'N' && p->buf[1] == 'S' && - p->buf[2] == 'V' && p->buf[3] == 'f') - return AVPROBE_SCORE_MAX; - /* streamed files might not have any header */ - if (p->buf[0] == 'N' && p->buf[1] == 'S' && - p->buf[2] == 'V' && p->buf[3] == 's') - return AVPROBE_SCORE_MAX; - /* XXX: do streamed files always start at chunk boundary ?? */ - /* or do we need to search NSVs in the byte stream ? */ - /* seems the servers don't bother starting clean chunks... */ - /* sometimes even the first header is at 9KB or something :^) */ - for (i = 1; i < p->buf_size - 3; i++) { - if (p->buf[i+0] == 'N' && p->buf[i+1] == 'S' && - p->buf[i+2] == 'V' && p->buf[i+3] == 's') - return AVPROBE_SCORE_MAX-20; - } - /* so we'll have more luck on extension... */ - if (match_ext(p->filename, "nsv")) - return AVPROBE_SCORE_MAX-20; - /* FIXME: add mime-type check */ - return 0; -} - -AVInputFormat nsv_demuxer = { - "nsv", - "NullSoft Video format", - sizeof(NSVContext), - nsv_probe, - nsv_read_header, - nsv_read_packet, - nsv_read_close, - nsv_read_seek, -}; |