| /* |
| * Bink demuxer |
| * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org) |
| * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu) |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * Bink demuxer |
| * |
| * Technical details here: |
| * http://wiki.multimedia.cx/index.php?title=Bink_Container |
| */ |
| |
| #include <inttypes.h> |
| |
| #include "libavutil/channel_layout.h" |
| #include "libavutil/intreadwrite.h" |
| #include "avformat.h" |
| #include "internal.h" |
| |
| enum BinkAudFlags { |
| BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output |
| BINK_AUD_STEREO = 0x2000, |
| BINK_AUD_USEDCT = 0x1000, |
| }; |
| |
| #define BINK_EXTRADATA_SIZE 1 |
| #define BINK_MAX_AUDIO_TRACKS 256 |
| #define BINK_MAX_WIDTH 7680 |
| #define BINK_MAX_HEIGHT 4800 |
| #define SMUSH_BLOCK_SIZE 512 |
| |
| typedef struct BinkDemuxContext { |
| uint32_t file_size; |
| |
| uint32_t num_audio_tracks; |
| int current_track; ///< audio track to return in next packet |
| int64_t video_pts; |
| int64_t audio_pts[BINK_MAX_AUDIO_TRACKS]; |
| |
| uint32_t remain_packet_size; |
| int flags; |
| int smush_size; |
| } BinkDemuxContext; |
| |
| static int probe(const AVProbeData *p) |
| { |
| const uint8_t *b = p->buf; |
| int smush = AV_RN32(p->buf) == AV_RN32("SMUS"); |
| |
| do { |
| if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && /* Bink 1 */ |
| (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' || |
| b[3] == 'k')) || |
| (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */ |
| (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || |
| b[3] == 'i' || b[3] == 'j' || b[3] == 'k'))) && |
| AV_RL32(b+8) > 0 && // num_frames |
| AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH && |
| AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT && |
| AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den |
| return AVPROBE_SCORE_MAX; |
| b += SMUSH_BLOCK_SIZE; |
| } while (smush && b < p->buf + p->buf_size - 32); |
| return 0; |
| } |
| |
| static int read_header(AVFormatContext *s) |
| { |
| BinkDemuxContext *bink = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint32_t fps_num, fps_den; |
| AVStream *vst, *ast; |
| unsigned int i; |
| uint32_t pos, next_pos; |
| uint16_t flags; |
| int next_keyframe = 1; |
| int keyframe; |
| int ret; |
| uint32_t signature; |
| uint8_t revision; |
| |
| vst = avformat_new_stream(s, NULL); |
| if (!vst) |
| return AVERROR(ENOMEM); |
| |
| vst->codecpar->codec_tag = avio_rl32(pb); |
| if (vst->codecpar->codec_tag == AV_RL32("SMUS")) { |
| do { |
| bink->smush_size += SMUSH_BLOCK_SIZE; |
| avio_skip(pb, SMUSH_BLOCK_SIZE - 4); |
| vst->codecpar->codec_tag = avio_rl32(pb); |
| } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK")); |
| if (avio_feof(pb)) { |
| av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| bink->file_size = avio_rl32(pb) + 8; |
| vst->duration = avio_rl32(pb); |
| |
| if (vst->duration > 1000000) { |
| av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n"); |
| return AVERROR(EIO); |
| } |
| |
| if (avio_rl32(pb) > bink->file_size) { |
| av_log(s, AV_LOG_ERROR, |
| "invalid header: largest frame size greater than file size\n"); |
| return AVERROR(EIO); |
| } |
| |
| avio_skip(pb, 4); |
| |
| vst->codecpar->width = avio_rl32(pb); |
| vst->codecpar->height = avio_rl32(pb); |
| |
| fps_num = avio_rl32(pb); |
| fps_den = avio_rl32(pb); |
| if (fps_num == 0 || fps_den == 0) { |
| av_log(s, AV_LOG_ERROR, |
| "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n", |
| fps_num, fps_den); |
| return AVERROR(EIO); |
| } |
| avpriv_set_pts_info(vst, 64, fps_den, fps_num); |
| vst->avg_frame_rate = av_inv_q(vst->time_base); |
| |
| vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
| vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO; |
| |
| if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) { |
| av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n"); |
| vst->codecpar->codec_id = AV_CODEC_ID_NONE; |
| } |
| |
| if ((ret = ff_get_extradata(s, vst->codecpar, pb, 4)) < 0) |
| return ret; |
| |
| bink->num_audio_tracks = avio_rl32(pb); |
| |
| if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) { |
| av_log(s, AV_LOG_ERROR, |
| "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n", |
| bink->num_audio_tracks); |
| return AVERROR(EIO); |
| } |
| |
| signature = (vst->codecpar->codec_tag & 0xFFFFFF); |
| revision = ((vst->codecpar->codec_tag >> 24) % 0xFF); |
| |
| if ((signature == AV_RL32("BIK") && (revision == 'k')) || |
| (signature == AV_RL32("KB2") && (revision == 'i' || revision == 'j' || revision == 'k'))) |
| avio_skip(pb, 4); /* unknown new field */ |
| |
| if (bink->num_audio_tracks) { |
| avio_skip(pb, 4 * bink->num_audio_tracks); /* max decoded size */ |
| |
| for (i = 0; i < bink->num_audio_tracks; i++) { |
| ast = avformat_new_stream(s, NULL); |
| if (!ast) |
| return AVERROR(ENOMEM); |
| ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| ast->codecpar->codec_tag = 0; |
| ast->codecpar->sample_rate = avio_rl16(pb); |
| avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate); |
| flags = avio_rl16(pb); |
| ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ? |
| AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT; |
| if (flags & BINK_AUD_STEREO) { |
| ast->codecpar->channels = 2; |
| ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; |
| } else { |
| ast->codecpar->channels = 1; |
| ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO; |
| } |
| if ((ret = ff_alloc_extradata(ast->codecpar, 4)) < 0) |
| return ret; |
| AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag); |
| } |
| |
| for (i = 0; i < bink->num_audio_tracks; i++) |
| s->streams[i + 1]->id = avio_rl32(pb); |
| } |
| |
| /* frame index table */ |
| next_pos = avio_rl32(pb); |
| for (i = 0; i < vst->duration; i++) { |
| pos = next_pos; |
| keyframe = next_keyframe; |
| if (i == vst->duration - 1) { |
| next_pos = bink->file_size; |
| next_keyframe = 0; |
| } else { |
| next_pos = avio_rl32(pb); |
| next_keyframe = next_pos & 1; |
| } |
| pos &= ~1; |
| next_pos &= ~1; |
| |
| if (next_pos <= pos) { |
| av_log(s, AV_LOG_ERROR, "invalid frame index table\n"); |
| return AVERROR(EIO); |
| } |
| if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0, |
| keyframe ? AVINDEX_KEYFRAME : 0)) < 0) |
| return ret; |
| } |
| |
| if (vst->index_entries) |
| avio_seek(pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET); |
| else |
| avio_skip(pb, 4); |
| |
| bink->current_track = -1; |
| return 0; |
| } |
| |
| static int read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| BinkDemuxContext *bink = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int ret; |
| |
| if (bink->current_track < 0) { |
| int index_entry; |
| AVStream *st = s->streams[0]; // stream 0 is video stream with index |
| |
| if (bink->video_pts >= st->duration) |
| return AVERROR_EOF; |
| |
| index_entry = av_index_search_timestamp(st, bink->video_pts, |
| AVSEEK_FLAG_ANY); |
| if (index_entry < 0) { |
| av_log(s, AV_LOG_ERROR, |
| "could not find index entry for frame %"PRId64"\n", |
| bink->video_pts); |
| return AVERROR(EIO); |
| } |
| |
| bink->remain_packet_size = st->index_entries[index_entry].size; |
| bink->flags = st->index_entries[index_entry].flags; |
| bink->current_track = 0; |
| } |
| |
| while (bink->current_track < bink->num_audio_tracks) { |
| uint32_t audio_size = avio_rl32(pb); |
| if (audio_size > bink->remain_packet_size - 4) { |
| av_log(s, AV_LOG_ERROR, |
| "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n", |
| bink->video_pts, audio_size, bink->remain_packet_size); |
| return AVERROR(EIO); |
| } |
| bink->remain_packet_size -= 4 + audio_size; |
| bink->current_track++; |
| if (audio_size >= 4) { |
| /* get one audio packet per track */ |
| if ((ret = av_get_packet(pb, pkt, audio_size)) < 0) |
| return ret; |
| pkt->stream_index = bink->current_track; |
| pkt->pts = bink->audio_pts[bink->current_track - 1]; |
| |
| /* Each audio packet reports the number of decompressed samples |
| (in bytes). We use this value to calculate the audio PTS */ |
| if (pkt->size >= 4) |
| bink->audio_pts[bink->current_track -1] += |
| AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels); |
| return 0; |
| } else { |
| avio_skip(pb, audio_size); |
| } |
| } |
| |
| /* get video packet */ |
| if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0) |
| return ret; |
| pkt->stream_index = 0; |
| pkt->pts = bink->video_pts++; |
| if (bink->flags & AVINDEX_KEYFRAME) |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| |
| /* -1 instructs the next call to read_packet() to read the next frame */ |
| bink->current_track = -1; |
| |
| return 0; |
| } |
| |
| static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
| { |
| BinkDemuxContext *bink = s->priv_data; |
| AVStream *vst = s->streams[0]; |
| int64_t ret; |
| |
| if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) |
| return -1; |
| |
| /* seek to the first frame */ |
| ret = avio_seek(s->pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET); |
| if (ret < 0) |
| return ret; |
| |
| bink->video_pts = 0; |
| memset(bink->audio_pts, 0, sizeof(bink->audio_pts)); |
| bink->current_track = -1; |
| return 0; |
| } |
| |
| AVInputFormat ff_bink_demuxer = { |
| .name = "bink", |
| .long_name = NULL_IF_CONFIG_SMALL("Bink"), |
| .priv_data_size = sizeof(BinkDemuxContext), |
| .read_probe = probe, |
| .read_header = read_header, |
| .read_packet = read_packet, |
| .read_seek = read_seek, |
| .flags = AVFMT_SHOW_IDS, |
| }; |
