diff options
Diffstat (limited to 'chromium/third_party/ffmpeg/libavformat/mlvdec.c')
| -rw-r--r-- | chromium/third_party/ffmpeg/libavformat/mlvdec.c | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/chromium/third_party/ffmpeg/libavformat/mlvdec.c b/chromium/third_party/ffmpeg/libavformat/mlvdec.c new file mode 100644 index 00000000000..a980ed6218c --- /dev/null +++ b/chromium/third_party/ffmpeg/libavformat/mlvdec.c @@ -0,0 +1,471 @@ +/* + * Magic Lantern Video (MLV) demuxer + * Copyright (c) 2014 Peter Ross + * + * 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 + * Magic Lantern Video (MLV) demuxer + */ + +#include "libavutil/eval.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/rational.h" +#include "avformat.h" +#include "internal.h" +#include "riff.h" + +#define MLV_VERSION "v2.0" + +#define MLV_VIDEO_CLASS_RAW 1 +#define MLV_VIDEO_CLASS_YUV 2 +#define MLV_VIDEO_CLASS_JPEG 3 +#define MLV_VIDEO_CLASS_H264 4 + +#define MLV_AUDIO_CLASS_WAV 1 + +#define MLV_CLASS_FLAG_DELTA 0x40 +#define MLV_CLASS_FLAG_LZMA 0x80 + +typedef struct { + AVIOContext *pb[101]; + int class[2]; + int stream_index; + uint64_t pts; +} MlvContext; + +static int probe(AVProbeData *p) +{ + if (AV_RL32(p->buf) == MKTAG('M','L','V','I') && + AV_RL32(p->buf + 4) >= 52 && + !memcmp(p->buf + 8, MLV_VERSION, 5)) + return AVPROBE_SCORE_MAX; + return 0; +} + +static int check_file_header(AVIOContext *pb, uint64_t guid) +{ + unsigned int size; + uint8_t version[8]; + + avio_skip(pb, 4); + size = avio_rl32(pb); + if (size < 52) + return AVERROR_INVALIDDATA; + avio_read(pb, version, 8); + if (memcmp(version, MLV_VERSION, 5) || avio_rl64(pb) != guid) + return AVERROR_INVALIDDATA; + avio_skip(pb, size - 24); + return 0; +} + +static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, int size) +{ + char * value = av_malloc(size + 1); + if (!value) { + avio_skip(pb, size); + return; + } + + avio_read(pb, value, size); + if (!value[0]) { + av_free(value); + return; + } + + value[size] = 0; + av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL); +} + +static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt) +{ + char value[4]; + snprintf(value, sizeof(value), "%i", avio_r8(pb)); + av_dict_set(&avctx->metadata, tag, value, 0); +} + +static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt) +{ + char value[8]; + snprintf(value, sizeof(value), "%i", avio_rl16(pb)); + av_dict_set(&avctx->metadata, tag, value, 0); +} + +static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt) +{ + char value[16]; + snprintf(value, sizeof(value), fmt, avio_rl32(pb)); + av_dict_set(&avctx->metadata, tag, value, 0); +} + +static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt) +{ + char value[32]; + snprintf(value, sizeof(value), fmt, avio_rl64(pb)); + av_dict_set(&avctx->metadata, tag, value, 0); +} + +static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file) +{ + MlvContext *mlv = avctx->priv_data; + AVIOContext *pb = mlv->pb[file]; + int ret; + while (!url_feof(pb)) { + int type; + unsigned int size; + type = avio_rl32(pb); + size = avio_rl32(pb); + avio_skip(pb, 8); //timestamp + if (size < 16) + break; + size -= 16; + if (vst && type == MKTAG('R','A','W','I') && size >= 164) { + vst->codec->width = avio_rl16(pb); + vst->codec->height = avio_rl16(pb); + if (avio_rl32(pb) != 1) + avpriv_request_sample(avctx, "raw api version"); + avio_skip(pb, 20); // pointer, width, height, pitch, frame_size + vst->codec->bits_per_coded_sample = avio_rl32(pb); + avio_skip(pb, 8 + 16 + 24); // black_level, white_level, xywh, active_area, exposure_bias + if (avio_rl32(pb) != 0x2010100) /* RGGB */ + avpriv_request_sample(avctx, "cfa_pattern"); + avio_skip(pb, 80); // calibration_illuminant1, color_matrix1, dynamic_range + vst->codec->pix_fmt = AV_PIX_FMT_BAYER_RGGB16LE; + vst->codec->codec_tag = MKTAG('B', 'I', 'T', 16); + size -= 164; + } else if (ast && type == MKTAG('W', 'A', 'V', 'I') && size >= 16) { + ret = ff_get_wav_header(pb, ast->codec, 16); + if (ret < 0) + return ret; + size -= 16; + } else if (type == MKTAG('I','N','F','O')) { + if (size > 0) + read_string(avctx, pb, "info", size); + continue; + } else if (type == MKTAG('I','D','N','T') && size >= 36) { + read_string(avctx, pb, "cameraName", 32); + read_uint32(avctx, pb, "cameraModel", "0x%"PRIx32); + size -= 36; + if (size >= 32) { + read_string(avctx, pb, "cameraSerial", 32); + size -= 32; + } + } else if (type == MKTAG('L','E','N','S') && size >= 48) { + read_uint16(avctx, pb, "focalLength", "%i"); + read_uint16(avctx, pb, "focalDist", "%i"); + read_uint16(avctx, pb, "aperture", "%i"); + read_uint8(avctx, pb, "stabilizerMode", "%i"); + read_uint8(avctx, pb, "autofocusMode", "%i"); + read_uint32(avctx, pb, "flags", "0x%"PRIx32); + read_uint32(avctx, pb, "lensID", "%"PRIi32); + read_string(avctx, pb, "lensName", 32); + size -= 48; + if (size >= 32) { + read_string(avctx, pb, "lensSerial", 32); + size -= 32; + } + } else if (vst && type == MKTAG('V', 'I', 'D', 'F') && size >= 4) { + uint64_t pts = avio_rl32(pb); + ff_add_index_entry(&vst->index_entries, &vst->nb_index_entries, &vst->index_entries_allocated_size, + avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME); + size -= 4; + } else if (ast && type == MKTAG('A', 'U', 'D', 'F') && size >= 4) { + uint64_t pts = avio_rl32(pb); + ff_add_index_entry(&ast->index_entries, &ast->nb_index_entries, &ast->index_entries_allocated_size, + avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME); + size -= 4; + } else if (vst && type == MKTAG('W','B','A','L') && size >= 28) { + read_uint32(avctx, pb, "wb_mode", "%"PRIi32); + read_uint32(avctx, pb, "kelvin", "%"PRIi32); + read_uint32(avctx, pb, "wbgain_r", "%"PRIi32); + read_uint32(avctx, pb, "wbgain_g", "%"PRIi32); + read_uint32(avctx, pb, "wbgain_b", "%"PRIi32); + read_uint32(avctx, pb, "wbs_gm", "%"PRIi32); + read_uint32(avctx, pb, "wbs_ba", "%"PRIi32); + size -= 28; + } else if (type == MKTAG('R','T','C','I') && size >= 20) { + char str[32]; + struct tm time = { 0 }; + time.tm_sec = avio_rl16(pb); + time.tm_min = avio_rl16(pb); + time.tm_hour = avio_rl16(pb); + time.tm_mday = avio_rl16(pb); + time.tm_mon = avio_rl16(pb); + time.tm_year = avio_rl16(pb); + time.tm_wday = avio_rl16(pb); + time.tm_yday = avio_rl16(pb); + time.tm_isdst = avio_rl16(pb); + avio_skip(pb, 2); + strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S", &time); + av_dict_set(&avctx->metadata, "time", str, 0); + size -= 20; + } else if (type == MKTAG('E','X','P','O') && size >= 16) { + av_dict_set(&avctx->metadata, "isoMode", avio_rl32(pb) ? "auto" : "manual", 0); + read_uint32(avctx, pb, "isoValue", "%"PRIi32); + read_uint32(avctx, pb, "isoAnalog", "%"PRIi32); + read_uint32(avctx, pb, "digitalGain", "%"PRIi32); + size -= 16; + if (size >= 8) { + read_uint64(avctx, pb, "shutterValue", "%"PRIi64); + size -= 8; + } + } else if (type == MKTAG('S','T','Y','L') && size >= 36) { + read_uint32(avctx, pb, "picStyleId", "%"PRIi32); + read_uint32(avctx, pb, "contrast", "%"PRIi32); + read_uint32(avctx, pb, "sharpness", "%"PRIi32); + read_uint32(avctx, pb, "saturation", "%"PRIi32); + read_uint32(avctx, pb, "colortone", "%"PRIi32); + read_string(avctx, pb, "picStyleName", 16); + size -= 36; + } else if (type == MKTAG('M','A','R','K')) { + } else if (type == MKTAG('N','U','L','L')) { + } else if (type == MKTAG('M','L','V','I')) { /* occurs when MLV and Mnn files are concatenated */ + } else { + av_log(avctx, AV_LOG_INFO, "unsupported tag %c%c%c%c, size %u\n", type&0xFF, (type>>8)&0xFF, (type>>16)&0xFF, (type>>24)&0xFF, size); + } + avio_skip(pb, size); + } + return 0; +} + +static int read_header(AVFormatContext *avctx) +{ + MlvContext *mlv = avctx->priv_data; + AVIOContext *pb = avctx->pb; + AVStream *vst = NULL, *ast = NULL; + int size, ret; + uint64_t guid; + char guidstr[32]; + + avio_skip(pb, 4); + size = avio_rl32(pb); + if (size < 52) + return AVERROR_INVALIDDATA; + + avio_skip(pb, 8); + + guid = avio_rl64(pb); + snprintf(guidstr, sizeof(guidstr), "0x%"PRIx64, guid); + av_dict_set(&avctx->metadata, "guid", guidstr, 0); + + avio_skip(pb, 8); //fileNum, fileCount, fileFlags + + mlv->class[0] = avio_rl16(pb); + if (mlv->class[0]) { + vst = avformat_new_stream(avctx, NULL); + if (!vst) + return AVERROR(ENOMEM); + vst->id = 0; + if ((mlv->class[0] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) + avpriv_request_sample(avctx, "compression"); + vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; + switch (mlv->class[0] & ~(MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)) { + case MLV_VIDEO_CLASS_RAW: + vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO; + break; + case MLV_VIDEO_CLASS_YUV: + vst->codec->pix_fmt = AV_PIX_FMT_YUV420P; + vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO; + vst->codec->codec_tag = 0; + break; + case MLV_VIDEO_CLASS_JPEG: + vst->codec->codec_id = AV_CODEC_ID_MJPEG; + vst->codec->codec_tag = 0; + break; + case MLV_VIDEO_CLASS_H264: + vst->codec->codec_id = AV_CODEC_ID_H264; + vst->codec->codec_tag = 0; + break; + default: + avpriv_request_sample(avctx, "unknown video class"); + } + } + + mlv->class[1] = avio_rl16(pb); + if (mlv->class[1]) { + ast = avformat_new_stream(avctx, NULL); + if (!ast) + return AVERROR(ENOMEM); + ast->id = 1; + if ((mlv->class[1] & MLV_CLASS_FLAG_LZMA)) + avpriv_request_sample(avctx, "compression"); + if ((mlv->class[1] & ~MLV_CLASS_FLAG_LZMA) != MLV_AUDIO_CLASS_WAV) + avpriv_request_sample(avctx, "unknown audio class"); + + ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; + avpriv_set_pts_info(ast, 33, 1, ast->codec->sample_rate); + } + + if (vst) + vst->nb_frames = avio_rl32(pb); + else + avio_skip(pb, 4); + + if (ast) + ast->nb_frames = avio_rl32(pb); + else + avio_skip(pb, 4); + + if (vst) { + AVRational framerate; + framerate.num = avio_rl32(pb); + framerate.den = avio_rl32(pb); + avpriv_set_pts_info(vst, 64, framerate.den, framerate.num); + } else + avio_skip(pb, 8); + + avio_skip(pb, size - 52); + + /* scan primary file */ + mlv->pb[100] = avctx->pb; + ret = scan_file(avctx, vst, ast, 100); + if (ret < 0) + return ret; + + /* scan secondary files */ + if (strlen(avctx->filename) > 2) { + int i; + char *filename = av_strdup(avctx->filename); + if (!filename) + return AVERROR(ENOMEM); + for (i = 0; i < 100; i++) { + snprintf(filename + strlen(filename) - 2, 3, "%02d", i); + if (avio_open2(&mlv->pb[i], filename, AVIO_FLAG_READ, &avctx->interrupt_callback, NULL) < 0) + break; + if (check_file_header(mlv->pb[i], guid) < 0) { + av_log(avctx, AV_LOG_WARNING, "ignoring %s; bad format or guid mismatch\n", filename); + avio_close(mlv->pb[i]); + mlv->pb[i] = NULL; + continue; + } + av_log(avctx, AV_LOG_INFO, "scanning %s\n", filename); + ret = scan_file(avctx, vst, ast, i); + if (ret < 0) { + av_log(avctx, AV_LOG_WARNING, "ignoring %s; %s\n", filename, av_err2str(ret)); + avio_close(mlv->pb[i]); + mlv->pb[i] = NULL; + continue; + } + } + av_free(filename); + } + + if (vst) + vst->duration = vst->nb_index_entries; + if (ast) + ast->duration = ast->nb_index_entries; + + if (vst && ast) + avio_seek(pb, FFMIN(vst->index_entries[0].pos, ast->index_entries[0].pos), SEEK_SET); + else if (vst) + avio_seek(pb, vst->index_entries[0].pos, SEEK_SET); + else if (ast) + avio_seek(pb, ast->index_entries[0].pos, SEEK_SET); + + return 0; +} + +static int read_packet(AVFormatContext *avctx, AVPacket *pkt) +{ + MlvContext *mlv = avctx->priv_data; + AVIOContext *pb; + AVStream *st = avctx->streams[mlv->stream_index]; + int index, ret; + unsigned int size, space; + + if (mlv->pts >= st->duration) + return AVERROR_EOF; + + index = av_index_search_timestamp(st, mlv->pts, AVSEEK_FLAG_ANY); + if (index < 0) { + av_log(avctx, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", mlv->pts); + return AVERROR(EIO); + } + + pb = mlv->pb[st->index_entries[index].size]; + avio_seek(pb, st->index_entries[index].pos, SEEK_SET); + + avio_skip(pb, 4); // blockType + size = avio_rl32(pb); + if (size < 16) + return AVERROR_INVALIDDATA; + avio_skip(pb, 12); //timestamp, frameNumber + if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) + avio_skip(pb, 8); // cropPosX, cropPosY, panPosX, panPosY + space = avio_rl32(pb); + avio_skip(pb, space); + + if ((mlv->class[st->id] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) { + ret = AVERROR_PATCHWELCOME; + } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { + ret = av_get_packet(pb, pkt, (st->codec->width * st->codec->height * st->codec->bits_per_coded_sample + 7) >> 3); + } else { // AVMEDIA_TYPE_AUDIO + if (space > UINT_MAX - 24 || size < (24 + space)) + return AVERROR_INVALIDDATA; + ret = av_get_packet(pb, pkt, size - (24 + space)); + } + + if (ret < 0) + return ret; + + pkt->stream_index = mlv->stream_index; + pkt->pts = mlv->pts; + + mlv->stream_index++; + if (mlv->stream_index == avctx->nb_streams) { + mlv->stream_index = 0; + mlv->pts++; + } + return 0; +} + +static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags) +{ + MlvContext *mlv = avctx->priv_data; + + if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE)) + return AVERROR(ENOSYS); + + if (!avctx->pb->seekable) + return AVERROR(EIO); + + mlv->pts = timestamp; + return 0; +} + +static int read_close(AVFormatContext *s) +{ + MlvContext *mlv = s->priv_data; + int i; + for (i = 0; i < 100; i++) + if (mlv->pb[i]) + avio_close(mlv->pb[i]); + return 0; +} + +AVInputFormat ff_mlv_demuxer = { + .name = "mlv", + .long_name = NULL_IF_CONFIG_SMALL("Magic Lantern Video (MLV)"), + .priv_data_size = sizeof(MlvContext), + .read_probe = probe, + .read_header = read_header, + .read_packet = read_packet, + .read_close = read_close, + .read_seek = read_seek, +}; |