diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/smacker.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/smacker.c | 51 |
1 files changed, 26 insertions, 25 deletions
diff --git a/contrib/ffmpeg/libavformat/smacker.c b/contrib/ffmpeg/libavformat/smacker.c index 04fde3d03..562a41616 100644 --- a/contrib/ffmpeg/libavformat/smacker.c +++ b/contrib/ffmpeg/libavformat/smacker.c @@ -28,6 +28,7 @@ #include "bswap.h" #define SMACKER_PAL 0x01 +#define SMACKER_FLAG_RING_FRAME 0x01 enum SAudFlags { SMK_AUD_PACKED = 0x80000000, @@ -88,8 +89,6 @@ static const uint8_t smk_pal[64] = { static int smacker_probe(AVProbeData *p) { - if (p->buf_size < 4) - return 0; if(p->buf[0] == 'S' && p->buf[1] == 'M' && p->buf[2] == 'K' && (p->buf[3] == '2' || p->buf[3] == '4')) return AVPROBE_SCORE_MAX; @@ -99,8 +98,8 @@ static int smacker_probe(AVProbeData *p) static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap) { - ByteIOContext *pb = &s->pb; - SmackerContext *smk = (SmackerContext *)s->priv_data; + ByteIOContext *pb = s->pb; + SmackerContext *smk = s->priv_data; AVStream *st, *ast[7]; int i, ret; int tbase; @@ -114,6 +113,8 @@ static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap) smk->frames = get_le32(pb); smk->pts_inc = (int32_t)get_le32(pb); smk->flags = get_le32(pb); + if(smk->flags & SMACKER_FLAG_RING_FRAME) + smk->frames++; for(i = 0; i < 7; i++) smk->audio[i] = get_le32(pb); smk->treesize = get_le32(pb); @@ -201,7 +202,7 @@ static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap) if(ret != st->codec->extradata_size - 16){ av_free(smk->frm_size); av_free(smk->frm_flags); - return AVERROR_IO; + return AVERROR(EIO); } ((int32_t*)st->codec->extradata)[0] = le2me_32(smk->mmap_size); ((int32_t*)st->codec->extradata)[1] = le2me_32(smk->mclr_size); @@ -217,7 +218,7 @@ static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap) static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt) { - SmackerContext *smk = (SmackerContext *)s->priv_data; + SmackerContext *smk = s->priv_data; int flags; int ret; int i; @@ -225,35 +226,35 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt) int palchange = 0; int pos; - if (url_feof(&s->pb) || smk->cur_frame >= smk->frames) + if (url_feof(s->pb) || smk->cur_frame >= smk->frames) return AVERROR(EIO); /* if we demuxed all streams, pass another frame */ if(smk->curstream < 0) { - url_fseek(&s->pb, smk->nextpos, 0); + url_fseek(s->pb, smk->nextpos, 0); frame_size = smk->frm_size[smk->cur_frame] & (~3); flags = smk->frm_flags[smk->cur_frame]; /* handle palette change event */ - pos = url_ftell(&s->pb); + pos = url_ftell(s->pb); if(flags & SMACKER_PAL){ int size, sz, t, off, j, pos; uint8_t *pal = smk->pal; uint8_t oldpal[768]; memcpy(oldpal, pal, 768); - size = get_byte(&s->pb); + size = get_byte(s->pb); size = size * 4 - 1; frame_size -= size; frame_size--; sz = 0; - pos = url_ftell(&s->pb) + size; + pos = url_ftell(s->pb) + size; while(sz < 256){ - t = get_byte(&s->pb); + t = get_byte(s->pb); if(t & 0x80){ /* skip palette entries */ sz += (t & 0x7F) + 1; pal += ((t & 0x7F) + 1) * 3; } else if(t & 0x40){ /* copy with offset */ - off = get_byte(&s->pb) * 3; + off = get_byte(s->pb) * 3; j = (t & 0x3F) + 1; while(j-- && sz < 256) { *pal++ = oldpal[off + 0]; @@ -264,12 +265,12 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt) } } else { /* new entries */ *pal++ = smk_pal[t]; - *pal++ = smk_pal[get_byte(&s->pb) & 0x3F]; - *pal++ = smk_pal[get_byte(&s->pb) & 0x3F]; + *pal++ = smk_pal[get_byte(s->pb) & 0x3F]; + *pal++ = smk_pal[get_byte(s->pb) & 0x3F]; sz++; } } - url_fseek(&s->pb, pos, 0); + url_fseek(s->pb, pos, 0); palchange |= 1; } flags >>= 1; @@ -278,35 +279,35 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt) for(i = 0; i < 7; i++) { if(flags & 1) { int size; - size = get_le32(&s->pb) - 4; + size = get_le32(s->pb) - 4; frame_size -= size; frame_size -= 4; smk->curstream++; smk->bufs[smk->curstream] = av_realloc(smk->bufs[smk->curstream], size); smk->buf_sizes[smk->curstream] = size; - ret = get_buffer(&s->pb, smk->bufs[smk->curstream], size); + ret = get_buffer(s->pb, smk->bufs[smk->curstream], size); if(ret != size) - return AVERROR_IO; + return AVERROR(EIO); smk->stream_id[smk->curstream] = smk->indexes[i]; } flags >>= 1; } if (av_new_packet(pkt, frame_size + 768)) - return AVERROR_NOMEM; + return AVERROR(ENOMEM); if(smk->frm_size[smk->cur_frame] & 1) palchange |= 2; pkt->data[0] = palchange; memcpy(pkt->data + 1, smk->pal, 768); - ret = get_buffer(&s->pb, pkt->data + 769, frame_size); + ret = get_buffer(s->pb, pkt->data + 769, frame_size); if(ret != frame_size) - return AVERROR_IO; + return AVERROR(EIO); pkt->stream_index = smk->videoindex; pkt->size = ret + 769; smk->cur_frame++; - smk->nextpos = url_ftell(&s->pb); + smk->nextpos = url_ftell(s->pb); } else { if (av_new_packet(pkt, smk->buf_sizes[smk->curstream])) - return AVERROR_NOMEM; + return AVERROR(ENOMEM); memcpy(pkt->data, smk->bufs[smk->curstream], smk->buf_sizes[smk->curstream]); pkt->size = smk->buf_sizes[smk->curstream]; pkt->stream_index = smk->stream_id[smk->curstream]; @@ -320,7 +321,7 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt) static int smacker_read_close(AVFormatContext *s) { - SmackerContext *smk = (SmackerContext *)s->priv_data; + SmackerContext *smk = s->priv_data; int i; for(i = 0; i < 7; i++) |