diff options
Diffstat (limited to 'libavformat/nsvdec.c')
| -rw-r--r-- | libavformat/nsvdec.c | 775 |
1 files changed, 775 insertions, 0 deletions
diff --git a/libavformat/nsvdec.c b/libavformat/nsvdec.c new file mode 100644 index 0000000000..fbec970f49 --- /dev/null +++ b/libavformat/nsvdec.c @@ -0,0 +1,775 @@ +/* + * NSV decoder. + * Copyright (c) 2004 The FFmpeg Project. + * + * This library 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. + * + * This library 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 + */ +#include "avformat.h" +#include "avi.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/ + * 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; + //DVDemuxContext* dv_demux; +} NSVContext; + +static const CodecTag 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_VP4, MKTAG('V', 'P', '4', ' ') }, + { CODEC_ID_VP4, MKTAG('V', 'P', '4', '0') }, + { 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_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 CodecTag 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 const uint64_t nsv_framerate_table[] = { + ((uint64_t)AV_TIME_BASE * 30), + ((uint64_t)AV_TIME_BASE * 30000 / 1001), /* 29.97 */ + ((uint64_t)AV_TIME_BASE * 25), + ((uint64_t)AV_TIME_BASE * 24000 / 1001), /* 23.98 */ + ((uint64_t)AV_TIME_BASE * 30), /* ?? */ + ((uint64_t)AV_TIME_BASE * 15000 / 1001), /* 14.98 */ +}; + +//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 v = 0; + int i; + + PRINT(("%s(), offset = %Ld, 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; + uint32_t tag, tag1, handler; + int codec_type, stream_index, frame_period, bit_rate, scale, rate; + unsigned int file_size, size, nb_frames; + int64_t duration; + int strings_size; + int table_entries; + int table_entries_used; + int i, n; + AVStream *st; + NSVStream *ast; + + 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 %ld\n", size)); + PRINT(("NSV NSVf file_size %Ld\n", file_size)); + + duration = get_le32(pb); /* in ms */ + nsv->duration = duration * AV_TIME_BASE / 1000; /* convert */ + PRINT(("NSV NSVf duration %Ld 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 %Ld\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 %Ld\n", url_ftell(pb))); + + if (table_entries_used > 0) { + nsv->index_entries = table_entries_used; + nsv->nsvf_index_data = av_malloc(table_entries * sizeof(uint32_t)); + get_buffer(pb, nsv->nsvf_index_data, table_entries * sizeof(uint32_t)); + } + + PRINT(("NSV got index; filepos %Ld\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; + uint32_t framerate; + uint16_t unknown; + AVStream *st; + NSVStream *nst; + PRINT(("%s()\n", __FUNCTION__)); + + vtag = get_le32(pb); + atag = get_le32(pb); + vwidth = get_le16(pb); + vheight = get_le16(pb); + framerate = (uint8_t)get_byte(pb); + /* XXX how big must the table be ? */ + /* seems there is more to that... */ + PRINT(("NSV NSVs framerate code %2x\n", framerate)); + framerate = (framerate & 0x80)?(nsv_framerate_table[framerate & 0x7F]):(framerate*AV_TIME_BASE); + unknown = 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)); + PRINT(("NSV NSVs framerate %2x\n", framerate)); +#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 */ + + st->codec.frame_rate = framerate; + st->codec.frame_rate_base = AV_TIME_BASE; + av_set_pts_info(st, 64, AV_TIME_BASE, framerate); + st->start_time = 0; + st->duration = nsv->duration; + } + 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->start_time = 0; + st->duration = nsv->duration; + + st->need_parsing = 1; /* for PCM we will read a chunk later and put correct info */ + /* XXX:FIXME */ + //st->codec.channels = 2; //XXX:channels; + //st->codec.sample_rate = 1000; + //av_set_pts_info(st, 64, 1, st->codec.sample_rate); + +#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; + 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 table_entries; + int i, n, err; + AVStream *st; + NSVStream *ast; + + 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; + uint32 v = 0; + int i, err = 0; + uint8 auxcount; /* number of aux metadata, also 4 bits of vsize */ + uint32 vsize; + uint16 asize; + uint16 auxsize; + uint32 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, %ld 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) + sizeof(uint32); /* 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_new_packet(pkt, vsize); + get_buffer(pb, pkt->data, vsize); + pkt->stream_index = st[NSV_ST_VIDEO]->index;//NSV_ST_VIDEO; + pkt->dts = nst->frame_offset++; + pkt->flags |= PKT_FLAG_KEY; /* stupid format has no way to tell XXX: try the index */ +/* + for (i = 0; i < MIN(8, vsize); i++) + PRINT(("NSV video: [%d] = %02x\n", i, pkt->data[i])); +*/ + } + 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 %ld\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; + av_set_pts_info(st[NSV_ST_AUDIO], 64, 1, + st[NSV_ST_AUDIO]->codec.sample_rate); + PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %ld\n", bps, channels, samplerate)); + } + } + av_new_packet(pkt, asize); + if (asize) + get_buffer(pb, pkt->data, asize); + pkt->stream_index = st[NSV_ST_AUDIO]->index;//NSV_ST_AUDIO; + //pkt->dts = nst->frame_offset; + //if (nst->sample_size) + // pkt->dts /= nst->sample_size; + nst->frame_offset += asize; // XXX: that's valid only for PCM !? + } + + //pkt->flags |= PKT_FLAG_KEY; + nsv->state = NSV_UNSYNC; + return 0; +} + + +static int nsv_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + NSVContext *nsv = s->priv_data; + ByteIOContext *pb = &s->pb; + 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) +{ + NSVContext *avi = s->priv_data; + AVStream *st; + NSVStream *ast; + int frame_number, i; + int64_t pos; + + 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.extradata); + 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; +} + +static AVInputFormat nsv_iformat = { + "nsv", + "NullSoft Video format", + sizeof(NSVContext), + nsv_probe, + nsv_read_header, + nsv_read_packet, + nsv_read_close, + nsv_read_seek, +}; + +int nsvdec_init(void) +{ + av_register_input_format(&nsv_iformat); + return 0; +} |