From 330b6a04822a49aec23a968061faac4f49a94afa Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9e=20Ekroth?= Date: Thu, 7 Aug 2014 19:52:56 +0200 Subject: decoder/Mp4v2: add MP4v2 decoder plugin This plugin uses the MP4v2 library to play mp4/m4a files. It is limited to file_decode. --- src/decoder/plugins/Mp4v2DecoderPlugin.cxx | 326 +++++++++++++++++++++++++++++ 1 file changed, 326 insertions(+) create mode 100644 src/decoder/plugins/Mp4v2DecoderPlugin.cxx (limited to 'src/decoder/plugins/Mp4v2DecoderPlugin.cxx') diff --git a/src/decoder/plugins/Mp4v2DecoderPlugin.cxx b/src/decoder/plugins/Mp4v2DecoderPlugin.cxx new file mode 100644 index 000000000..3cdd97167 --- /dev/null +++ b/src/decoder/plugins/Mp4v2DecoderPlugin.cxx @@ -0,0 +1,326 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "Mp4v2DecoderPlugin.hxx" +#include "../DecoderAPI.hxx" +#include "CheckAudioFormat.hxx" +#include "tag/TagHandler.hxx" +#include "fs/Path.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "Log.hxx" + +#include +#include + +#include +#include + +static constexpr Domain mp4v2_decoder_domain("mp4v2"); + +static MP4TrackId +mp4_get_aac_track(MP4FileHandle handle, NeAACDecHandle decoder, + AudioFormat &audio_format, Error &error) +{ + uint32_t sample_rate; +#ifdef HAVE_FAAD_LONG + /* neaacdec.h declares all arguments as "unsigned long", but + internally expects uint32_t pointers. To avoid gcc + warnings, use this workaround. */ + unsigned long *sample_rate_r = (unsigned long*)&sample_rate; +#else + uint32_t *sample_rate_r = sample_rate; +#endif + + const MP4TrackId tracks = MP4GetNumberOfTracks(handle); + + for (MP4TrackId id = 1; id <= tracks; id++) { + const char* track_type = MP4GetTrackType(handle, id); + + if (track_type == 0) + continue; + + const auto obj_type = MP4GetTrackEsdsObjectTypeId(handle, id); + + if (obj_type == MP4_INVALID_AUDIO_TYPE) + continue; + if (obj_type == MP4_MPEG4_AUDIO_TYPE) { + const auto mpeg_type = MP4GetTrackAudioMpeg4Type(handle, id); + if (!MP4_IS_MPEG4_AAC_AUDIO_TYPE(mpeg_type)) + continue; + } else if (!MP4_IS_AAC_AUDIO_TYPE(obj_type)) + continue; + + if (decoder == nullptr) + /* found audio track, no decoder */ + return id; + + unsigned char *buff = nullptr; + unsigned buff_size = 0; + + if (!MP4GetTrackESConfiguration(handle, id, &buff, &buff_size)) + continue; + + uint8_t channels; + int32_t nbytes = NeAACDecInit(decoder, buff, buff_size, + sample_rate_r, &channels); + + free(buff); + + if (nbytes < 0) + /* invalid stream */ + continue; + + if (!audio_format_init_checked(audio_format, sample_rate, + SampleFormat::S16, + channels, + error)) { + error.Set(mp4v2_decoder_domain, + "Invalid audio format"); + continue; + } + + return id; + } + + return MP4_INVALID_TRACK_ID; +} + +static NeAACDecHandle +mp4_faad_new(MP4FileHandle handle, AudioFormat &audio_format, Error &error) +{ + const NeAACDecHandle decoder = NeAACDecOpen(); + const NeAACDecConfigurationPtr config = + NeAACDecGetCurrentConfiguration(decoder); + config->outputFormat = FAAD_FMT_16BIT; + config->downMatrix = 1; + config->dontUpSampleImplicitSBR = 0; + NeAACDecSetConfiguration(decoder, config); + + const auto track = mp4_get_aac_track(handle, decoder, audio_format, error); + + if (track == MP4_INVALID_TRACK_ID) { + LogError(error); + NeAACDecClose(decoder); + return nullptr; + } + + return decoder; +} + +static void +mp4_file_decode(Decoder &mpd_decoder, Path path_fs) +{ + const MP4FileHandle handle = MP4Read(path_fs.c_str()); + + if (handle == MP4_INVALID_FILE_HANDLE) { + FormatError(mp4v2_decoder_domain, + "Unable to open file"); + return; + } + + AudioFormat audio_format; + Error error; + const NeAACDecHandle decoder = mp4_faad_new(handle, audio_format, error); + + if (decoder == nullptr) { + LogError(error); + MP4Close(handle); + return; + } + + const MP4TrackId track = mp4_get_aac_track(handle, nullptr, audio_format, error); + + /* initialize the MPD core */ + + const uint32_t scale = MP4GetTrackTimeScale(handle, track); + const float duration = ((float)MP4GetTrackDuration(handle, track)) / scale + 0.5f; + const MP4SampleId num_samples = MP4GetTrackNumberOfSamples(handle, track); + + decoder_initialized(mpd_decoder, audio_format, true, duration); + + /* the decoder loop */ + + DecoderCommand cmd = DecoderCommand::NONE; + + for (MP4SampleId sample = 1; + sample < num_samples && cmd != DecoderCommand::STOP; + sample++) { + unsigned char *data = nullptr; + unsigned int data_length = 0; + + if (cmd == DecoderCommand::SEEK) { + const double offset = decoder_seek_where(mpd_decoder); + sample = MP4GetSampleIdFromTime(handle, track, + (MP4Timestamp)(offset * (double)scale), 0); + decoder_command_finished(mpd_decoder); + } + + /* read */ + if (MP4ReadSample(handle, track, sample, &data, &data_length) == 0) { + FormatError(mp4v2_decoder_domain, "unable to read sample"); + break; + } + + /* decode it */ + NeAACDecFrameInfo frame_info; + const void *const decoded = NeAACDecDecode(decoder, &frame_info, data, data_length); + + if (frame_info.error > 0) { + FormatWarning(mp4v2_decoder_domain, + "error decoding AAC stream: %s", + NeAACDecGetErrorMessage(frame_info.error)); + break; + } + + if (frame_info.channels != audio_format.channels) { + FormatDefault(mp4v2_decoder_domain, + "channel count changed from %u to %u", + audio_format.channels, frame_info.channels); + break; + } + + if (frame_info.samplerate != audio_format.sample_rate) { + FormatDefault(mp4v2_decoder_domain, + "sample rate changed from %u to %lu", + audio_format.sample_rate, + (unsigned long)frame_info.samplerate); + break; + } + + /* update bit rate and position */ + unsigned bit_rate = 0; + + if (frame_info.samples > 0) { + bit_rate = frame_info.bytesconsumed * 8.0 * + frame_info.channels * audio_format.sample_rate / + frame_info.samples / 1000 + 0.5; + } + + /* send PCM samples to MPD */ + + cmd = decoder_data(mpd_decoder, nullptr, decoded, + (size_t)frame_info.samples * 2, + bit_rate); + + free(data); + } + + /* cleanup */ + NeAACDecClose(decoder); + MP4Close(handle); +} + +static inline void +mp4_safe_invoke_tag(const struct tag_handler *handler, void *handler_ctx, + TagType tag, const char *value) +{ + if (value != nullptr) + tag_handler_invoke_tag(handler, handler_ctx, tag, value); +} + +static bool +mp4_scan_file(Path path_fs, + const struct tag_handler *handler, void *handler_ctx) +{ + const MP4FileHandle handle = MP4Read(path_fs.c_str()); + + if (handle == MP4_INVALID_FILE_HANDLE) + return false; + + AudioFormat tmp_audio_format; + Error error; + const MP4TrackId id = mp4_get_aac_track(handle, nullptr, tmp_audio_format, error); + + if (id == MP4_INVALID_TRACK_ID) { + LogError(error); + MP4Close(handle); + return false; + } + + const MP4Duration dur = MP4GetTrackDuration(handle, id) / + MP4GetTrackTimeScale(handle, id); + tag_handler_invoke_duration(handler, handler_ctx, dur); + + const MP4Tags* tags = MP4TagsAlloc(); + MP4TagsFetch(tags, handle); + + mp4_safe_invoke_tag(handler, handler_ctx, TAG_NAME, tags->name); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_ARTIST, tags->artist); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_ALBUM_ARTIST, tags->albumArtist); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_ALBUM, tags->album); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_COMPOSER, tags->composer); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_COMMENT, tags->comments); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_GENRE, tags->genre); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_DATE, tags->releaseDate); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_ARTIST_SORT, tags->sortArtist); + mp4_safe_invoke_tag(handler, handler_ctx, TAG_ALBUM_ARTIST_SORT, tags->sortAlbumArtist); + + char buff[8]; /* tmp buffer for index to string. */ + if (tags->track != nullptr) { + sprintf(buff, "%d", tags->track->index); + tag_handler_invoke_tag(handler, handler_ctx, TAG_TRACK, buff); + } + + if (tags->disk != nullptr) { + sprintf(buff, "%d", tags->disk->index); + tag_handler_invoke_tag(handler, handler_ctx, TAG_DISC, buff); + } + + MP4TagsFree(tags); + MP4Close(handle); + + return true; +} + +static const char *const mp4_suffixes[] = { + "mp4", + "m4a", + /* "m4p", encrypted */ + /* "m4b", audio book */ + /* "m4r", ring tones */ + /* "m4v", video */ + nullptr +}; + +static const char *const mp4_mime_types[] = { + "application/mp4", + "application/m4a", + "audio/mp4", + "audio/m4a", + /* "audio/m4p", */ + /* "audio/m4b", */ + /* "audio/m4r", */ + /* "audio/m4v", */ + nullptr +}; + +const struct DecoderPlugin mp4v2_decoder_plugin = { + "mp4v2", + nullptr, + nullptr, + nullptr, + mp4_file_decode, + mp4_scan_file, + nullptr, + nullptr, + mp4_suffixes, + mp4_mime_types +}; -- cgit v1.2.3