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n3.4.14
libavformat/libmodplug.c
382 строки
16 KB
Derek Buitenhuis
Merge commit '9200514ad8717c63f82101dc394f4378854325bf'
10 апр 2016, 22:59
10 апр 2016, 22:59
6f69f7a
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/* * 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 * ModPlug demuxer * @todo better probing than extensions matching */ #define MODPLUG_STATIC #include <libmodplug/modplug.h> #include "libavutil/avstring.h" #include "libavutil/eval.h" #include "libavutil/opt.h" #include "avformat.h" #include "internal.h" typedef struct ModPlugContext { const AVClass *class; ModPlugFile *f; uint8_t *buf; ///< input file content /* options */ int noise_reduction; int reverb_depth; int reverb_delay; int bass_amount; int bass_range; int surround_depth; int surround_delay; int max_size; ///< max file size to allocate /* optional video stream */ double ts_per_packet; ///< used to define the pts/dts using packet_count; int packet_count; ///< total number of audio packets int print_textinfo; ///< bool flag for printing speed, tempo, order, ... int video_stream; ///< 1 if the user want a video stream, otherwise 0 int w; ///< video stream width in char (one char = 8x8px) int h; ///< video stream height in char (one char = 8x8px) int video_switch; ///< 1 if current packet is video, otherwise 0 int fsize; ///< constant frame size int linesize; ///< line size in bytes char *color_eval; ///< color eval user input expression AVExpr *expr; ///< parsed color eval expression } ModPlugContext; static const char * const var_names[] = { "x", "y", "w", "h", "t", "speed", "tempo", "order", "pattern", "row", NULL }; enum var_name { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_TIME, VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW, VAR_VARS_NB }; #define FF_MODPLUG_MAX_FILE_SIZE (100 * 1<<20) // 100M #define FF_MODPLUG_DEF_FILE_SIZE ( 5 * 1<<20) // 5M #define OFFSET(x) offsetof(ModPlugContext, x) #define D AV_OPT_FLAG_DECODING_PARAM static const AVOption options[] = { {"noise_reduction", "Enable noise reduction 0(off)-1(on)", OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D}, {"reverb_depth", "Reverb level 0(quiet)-100(loud)", OFFSET(reverb_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D}, {"reverb_delay", "Reverb delay in ms, usually 40-200ms", OFFSET(reverb_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D}, {"bass_amount", "XBass level 0(quiet)-100(loud)", OFFSET(bass_amount), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D}, {"bass_range", "XBass cutoff in Hz 10-100", OFFSET(bass_range), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D}, {"surround_depth", "Surround level 0(quiet)-100(heavy)", OFFSET(surround_depth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 100, D}, {"surround_delay", "Surround delay in ms, usually 5-40ms", OFFSET(surround_delay), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D}, {"max_size", "Max file size supported (in bytes). Default is 5MB. Set to 0 for no limit (not recommended)", OFFSET(max_size), AV_OPT_TYPE_INT, {.i64 = FF_MODPLUG_DEF_FILE_SIZE}, 0, FF_MODPLUG_MAX_FILE_SIZE, D}, {"video_stream_expr", "Color formula", OFFSET(color_eval), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D}, {"video_stream", "Make demuxer output a video stream", OFFSET(video_stream), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D}, {"video_stream_w", "Video stream width in char (one char = 8x8px)", OFFSET(w), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D}, {"video_stream_h", "Video stream height in char (one char = 8x8px)", OFFSET(h), AV_OPT_TYPE_INT, {.i64 = 30}, 20, 512, D}, {"video_stream_ptxt", "Print speed, tempo, order, ... in video stream", OFFSET(print_textinfo), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, D}, {NULL}, }; #define SET_OPT_IF_REQUESTED(libopt, opt, flag) do { \ if (modplug->opt) { \ settings.libopt = modplug->opt; \ settings.mFlags |= flag; \ } \ } while (0) #define ADD_META_MULTIPLE_ENTRIES(entry_name, fname) do { \ if (n_## entry_name ##s) { \ unsigned i, n = 0; \ \ for (i = 0; i < n_## entry_name ##s; i++) { \ char item_name[64] = {0}; \ fname(f, i, item_name); \ if (!*item_name) \ continue; \ if (n) \ av_dict_set(&s->metadata, #entry_name, "\n", AV_DICT_APPEND); \ av_dict_set(&s->metadata, #entry_name, item_name, AV_DICT_APPEND); \ n++; \ } \ \ extra = av_asprintf(", %u/%u " #entry_name "%s", \ n, n_## entry_name ##s, n > 1 ? "s" : ""); \ if (!extra) \ return AVERROR(ENOMEM); \ av_dict_set(&s->metadata, "extra info", extra, AV_DICT_APPEND); \ av_free(extra); \ } \ } while (0) static int modplug_load_metadata(AVFormatContext *s) { ModPlugContext *modplug = s->priv_data; ModPlugFile *f = modplug->f; char *extra; const char *name = ModPlug_GetName(f); const char *msg = ModPlug_GetMessage(f); unsigned n_instruments = ModPlug_NumInstruments(f); unsigned n_samples = ModPlug_NumSamples(f); unsigned n_patterns = ModPlug_NumPatterns(f); unsigned n_channels = ModPlug_NumChannels(f); if (name && *name) av_dict_set(&s->metadata, "name", name, 0); if (msg && *msg) av_dict_set(&s->metadata, "message", msg, 0); extra = av_asprintf("%u pattern%s, %u channel%s", n_patterns, n_patterns > 1 ? "s" : "", n_channels, n_channels > 1 ? "s" : ""); if (!extra) return AVERROR(ENOMEM); av_dict_set(&s->metadata, "extra info", extra, AV_DICT_DONT_STRDUP_VAL); ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName); ADD_META_MULTIPLE_ENTRIES(sample, ModPlug_SampleName); return 0; } #define AUDIO_PKT_SIZE 512 static int modplug_read_header(AVFormatContext *s) { AVStream *st; AVIOContext *pb = s->pb; ModPlug_Settings settings; ModPlugContext *modplug = s->priv_data; int64_t sz = avio_size(pb); if (sz < 0) { av_log(s, AV_LOG_WARNING, "Could not determine file size\n"); sz = modplug->max_size; } else if (modplug->max_size && sz > modplug->max_size) { sz = modplug->max_size; av_log(s, AV_LOG_WARNING, "Max file size reach%s, allocating %"PRIi64"B " "but demuxing is likely to fail due to incomplete buffer\n", sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz); } if (modplug->color_eval) { int r = av_expr_parse(&modplug->expr, modplug->color_eval, var_names, NULL, NULL, NULL, NULL, 0, s); if (r < 0) return r; } modplug->buf = av_malloc(modplug->max_size); if (!modplug->buf) return AVERROR(ENOMEM); sz = avio_read(pb, modplug->buf, sz); ModPlug_GetSettings(&settings); settings.mChannels = 2; settings.mBits = 16; settings.mFrequency = 44100; settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality settings.mLoopCount = 0; // prevents looping forever if (modplug->noise_reduction) settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION; SET_OPT_IF_REQUESTED(mReverbDepth, reverb_depth, MODPLUG_ENABLE_REVERB); SET_OPT_IF_REQUESTED(mReverbDelay, reverb_delay, MODPLUG_ENABLE_REVERB); SET_OPT_IF_REQUESTED(mBassAmount, bass_amount, MODPLUG_ENABLE_MEGABASS); SET_OPT_IF_REQUESTED(mBassRange, bass_range, MODPLUG_ENABLE_MEGABASS); SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND); SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND); if (modplug->reverb_depth) settings.mReverbDepth = modplug->reverb_depth; if (modplug->reverb_delay) settings.mReverbDelay = modplug->reverb_delay; if (modplug->bass_amount) settings.mBassAmount = modplug->bass_amount; if (modplug->bass_range) settings.mBassRange = modplug->bass_range; if (modplug->surround_depth) settings.mSurroundDepth = modplug->surround_depth; if (modplug->surround_delay) settings.mSurroundDelay = modplug->surround_delay; ModPlug_SetSettings(&settings); modplug->f = ModPlug_Load(modplug->buf, sz); if (!modplug->f) return AVERROR_INVALIDDATA; st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); avpriv_set_pts_info(st, 64, 1, 1000); st->duration = ModPlug_GetLength(modplug->f); st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; st->codecpar->channels = settings.mChannels; st->codecpar->sample_rate = settings.mFrequency; // timebase = 1/1000, 2ch 16bits 44.1kHz-> 2*2*44100 modplug->ts_per_packet = 1000*AUDIO_PKT_SIZE / (4*44100.); if (modplug->video_stream) { AVStream *vst = avformat_new_stream(s, NULL); if (!vst) return AVERROR(ENOMEM); avpriv_set_pts_info(vst, 64, 1, 1000); vst->duration = st->duration; vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; vst->codecpar->codec_id = AV_CODEC_ID_XBIN; vst->codecpar->width = modplug->w << 3; vst->codecpar->height = modplug->h << 3; modplug->linesize = modplug->w * 3; modplug->fsize = modplug->linesize * modplug->h; } return modplug_load_metadata(s); } static void write_text(uint8_t *dst, const char *s, int linesize, int x, int y) { int i; dst += y*linesize + x*3; for (i = 0; s[i]; i++, dst += 3) { dst[0] = 0x0; // count - 1 dst[1] = s[i]; // char dst[2] = 0x0f; // background / foreground } } #define PRINT_INFO(line, name, idvalue) do { \ snprintf(intbuf, sizeof(intbuf), "%.0f", var_values[idvalue]); \ write_text(pkt->data, name ":", modplug->linesize, 0+1, line+1); \ write_text(pkt->data, intbuf, modplug->linesize, 10+1, line+1); \ } while (0) static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt) { ModPlugContext *modplug = s->priv_data; if (modplug->video_stream) { modplug->video_switch ^= 1; // one video packet for one audio packet if (modplug->video_switch) { double var_values[VAR_VARS_NB]; var_values[VAR_W ] = modplug->w; var_values[VAR_H ] = modplug->h; var_values[VAR_TIME ] = modplug->packet_count * modplug->ts_per_packet; var_values[VAR_SPEED ] = ModPlug_GetCurrentSpeed (modplug->f); var_values[VAR_TEMPO ] = ModPlug_GetCurrentTempo (modplug->f); var_values[VAR_ORDER ] = ModPlug_GetCurrentOrder (modplug->f); var_values[VAR_PATTERN] = ModPlug_GetCurrentPattern(modplug->f); var_values[VAR_ROW ] = ModPlug_GetCurrentRow (modplug->f); if (av_new_packet(pkt, modplug->fsize) < 0) return AVERROR(ENOMEM); pkt->stream_index = 1; memset(pkt->data, 0, modplug->fsize); if (modplug->print_textinfo) { char intbuf[32]; PRINT_INFO(0, "speed", VAR_SPEED); PRINT_INFO(1, "tempo", VAR_TEMPO); PRINT_INFO(2, "order", VAR_ORDER); PRINT_INFO(3, "pattern", VAR_PATTERN); PRINT_INFO(4, "row", VAR_ROW); PRINT_INFO(5, "ts", VAR_TIME); } if (modplug->expr) { int x, y; for (y = 0; y < modplug->h; y++) { for (x = 0; x < modplug->w; x++) { double color; var_values[VAR_X] = x; var_values[VAR_Y] = y; color = av_expr_eval(modplug->expr, var_values, NULL); pkt->data[y*modplug->linesize + x*3 + 2] |= av_clip((int)color, 0, 0xf)<<4; } } } pkt->pts = pkt->dts = var_values[VAR_TIME]; pkt->flags |= AV_PKT_FLAG_KEY; return 0; } } if (av_new_packet(pkt, AUDIO_PKT_SIZE) < 0) return AVERROR(ENOMEM); if (modplug->video_stream) pkt->pts = pkt->dts = modplug->packet_count++ * modplug->ts_per_packet; pkt->size = ModPlug_Read(modplug->f, pkt->data, AUDIO_PKT_SIZE); if (pkt->size <= 0) { av_packet_unref(pkt); return pkt->size == 0 ? AVERROR_EOF : AVERROR(EIO); } return 0; } static int modplug_read_close(AVFormatContext *s) { ModPlugContext *modplug = s->priv_data; ModPlug_Unload(modplug->f); av_freep(&modplug->buf); return 0; } static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags) { ModPlugContext *modplug = s->priv_data; ModPlug_Seek(modplug->f, (int)ts); if (modplug->video_stream) modplug->packet_count = ts / modplug->ts_per_packet; return 0; } static const char modplug_extensions[] = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm,itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz"; static int modplug_probe(AVProbeData *p) { if (av_match_ext(p->filename, modplug_extensions)) { if (p->buf_size < 16384) return AVPROBE_SCORE_EXTENSION/2-1; else return AVPROBE_SCORE_EXTENSION; } return 0; } static const AVClass modplug_class = { .class_name = "ModPlug demuxer", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; AVInputFormat ff_libmodplug_demuxer = { .name = "libmodplug", .long_name = NULL_IF_CONFIG_SMALL("ModPlug demuxer"), .priv_data_size = sizeof(ModPlugContext), .read_probe = modplug_probe, .read_header = modplug_read_header, .read_packet = modplug_read_packet, .read_close = modplug_read_close, .read_seek = modplug_read_seek, .extensions = modplug_extensions, .priv_class = &modplug_class, };