diff options
Diffstat (limited to 'src/decoder/faad_plugin.c')
-rw-r--r-- | src/decoder/faad_plugin.c | 515 |
1 files changed, 0 insertions, 515 deletions
diff --git a/src/decoder/faad_plugin.c b/src/decoder/faad_plugin.c deleted file mode 100644 index 8f932ad58..000000000 --- a/src/decoder/faad_plugin.c +++ /dev/null @@ -1,515 +0,0 @@ -/* - * Copyright (C) 2003-2010 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" -#include "decoder_api.h" -#include "decoder_buffer.h" -#include "audio_check.h" - -#define AAC_MAX_CHANNELS 6 - -#include <assert.h> -#include <unistd.h> -#include <faad.h> -#include <glib.h> - -#undef G_LOG_DOMAIN -#define G_LOG_DOMAIN "faad" - -static const unsigned adts_sample_rates[] = - { 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, - 16000, 12000, 11025, 8000, 7350, 0, 0, 0 -}; - -/** - * The GLib quark used for errors reported by this plugin. - */ -static inline GQuark -faad_decoder_quark(void) -{ - return g_quark_from_static_string("faad"); -} - -/** - * Check whether the buffer head is an AAC frame, and return the frame - * length. Returns 0 if it is not a frame. - */ -static size_t -adts_check_frame(const unsigned char *data) -{ - /* check syncword */ - if (!((data[0] == 0xFF) && ((data[1] & 0xF6) == 0xF0))) - return 0; - - return (((unsigned int)data[3] & 0x3) << 11) | - (((unsigned int)data[4]) << 3) | - (data[5] >> 5); -} - -/** - * Find the next AAC frame in the buffer. Returns 0 if no frame is - * found or if not enough data is available. - */ -static size_t -adts_find_frame(struct decoder_buffer *buffer) -{ - const unsigned char *data, *p; - size_t length, frame_length; - bool ret; - - while (true) { - data = decoder_buffer_read(buffer, &length); - if (data == NULL || length < 8) { - /* not enough data yet */ - ret = decoder_buffer_fill(buffer); - if (!ret) - /* failed */ - return 0; - - continue; - } - - /* find the 0xff marker */ - p = memchr(data, 0xff, length); - if (p == NULL) { - /* no marker - discard the buffer */ - decoder_buffer_consume(buffer, length); - continue; - } - - if (p > data) { - /* discard data before 0xff */ - decoder_buffer_consume(buffer, p - data); - continue; - } - - /* is it a frame? */ - frame_length = adts_check_frame(data); - if (frame_length == 0) { - /* it's just some random 0xff byte; discard it - and continue searching */ - decoder_buffer_consume(buffer, 1); - continue; - } - - if (length < frame_length) { - /* available buffer size is smaller than the - frame will be - attempt to read more - data */ - ret = decoder_buffer_fill(buffer); - if (!ret) { - /* not enough data; discard this frame - to prevent a possible buffer - overflow */ - data = decoder_buffer_read(buffer, &length); - if (data != NULL) - decoder_buffer_consume(buffer, length); - } - - continue; - } - - /* found a full frame! */ - return frame_length; - } -} - -static float -adts_song_duration(struct decoder_buffer *buffer) -{ - unsigned int frames, frame_length; - unsigned sample_rate = 0; - float frames_per_second; - - /* Read all frames to ensure correct time and bitrate */ - for (frames = 0;; frames++) { - frame_length = adts_find_frame(buffer); - if (frame_length == 0) - break; - - - if (frames == 0) { - const unsigned char *data; - size_t buffer_length; - - data = decoder_buffer_read(buffer, &buffer_length); - assert(data != NULL); - assert(frame_length <= buffer_length); - - sample_rate = adts_sample_rates[(data[2] & 0x3c) >> 2]; - } - - decoder_buffer_consume(buffer, frame_length); - } - - frames_per_second = (float)sample_rate / 1024.0; - if (frames_per_second <= 0) - return -1; - - return (float)frames / frames_per_second; -} - -static float -faad_song_duration(struct decoder_buffer *buffer, struct input_stream *is) -{ - size_t fileread; - size_t tagsize; - const unsigned char *data; - size_t length; - bool success; - - fileread = is->size >= 0 ? is->size : 0; - - decoder_buffer_fill(buffer); - data = decoder_buffer_read(buffer, &length); - if (data == NULL) - return -1; - - tagsize = 0; - if (length >= 10 && !memcmp(data, "ID3", 3)) { - /* skip the ID3 tag */ - - tagsize = (data[6] << 21) | (data[7] << 14) | - (data[8] << 7) | (data[9] << 0); - - tagsize += 10; - - success = decoder_buffer_skip(buffer, tagsize) && - decoder_buffer_fill(buffer); - if (!success) - return -1; - - data = decoder_buffer_read(buffer, &length); - if (data == NULL) - return -1; - } - - if (is->seekable && length >= 2 && - data[0] == 0xFF && ((data[1] & 0xF6) == 0xF0)) { - /* obtain the duration from the ADTS header */ - float song_length = adts_song_duration(buffer); - - input_stream_seek(is, tagsize, SEEK_SET, NULL); - - data = decoder_buffer_read(buffer, &length); - if (data != NULL) - decoder_buffer_consume(buffer, length); - decoder_buffer_fill(buffer); - - return song_length; - } else if (length >= 5 && memcmp(data, "ADIF", 4) == 0) { - /* obtain the duration from the ADIF header */ - unsigned bit_rate; - size_t skip_size = (data[4] & 0x80) ? 9 : 0; - - if (8 + skip_size > length) - /* not enough data yet; skip parsing this - header */ - return -1; - - bit_rate = ((data[4 + skip_size] & 0x0F) << 19) | - (data[5 + skip_size] << 11) | - (data[6 + skip_size] << 3) | - (data[7 + skip_size] & 0xE0); - - if (fileread != 0 && bit_rate != 0) - return fileread * 8.0 / bit_rate; - else - return fileread; - } else - return -1; -} - -/** - * Wrapper for faacDecInit() which works around some API - * inconsistencies in libfaad. - */ -static bool -faad_decoder_init(faacDecHandle decoder, struct decoder_buffer *buffer, - struct audio_format *audio_format, GError **error_r) -{ - union { - /* deconst hack for libfaad */ - const void *in; - void *out; - } u; - size_t length; - int32_t nbytes; - uint32_t sample_rate; - uint8_t channels; -#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_p = (unsigned long *)(void *)&sample_rate; -#else - uint32_t *sample_rate_p = &sample_rate; -#endif - - u.in = decoder_buffer_read(buffer, &length); - if (u.in == NULL) { - g_set_error(error_r, faad_decoder_quark(), 0, - "Empty file"); - return false; - } - - nbytes = faacDecInit(decoder, u.out, -#ifdef HAVE_FAAD_BUFLEN_FUNCS - length, -#endif - sample_rate_p, &channels); - if (nbytes < 0) { - g_set_error(error_r, faad_decoder_quark(), 0, - "Not an AAC stream"); - return false; - } - - decoder_buffer_consume(buffer, nbytes); - - return audio_format_init_checked(audio_format, sample_rate, - SAMPLE_FORMAT_S16, channels, error_r); -} - -/** - * Wrapper for faacDecDecode() which works around some API - * inconsistencies in libfaad. - */ -static const void * -faad_decoder_decode(faacDecHandle decoder, struct decoder_buffer *buffer, - faacDecFrameInfo *frame_info) -{ - union { - /* deconst hack for libfaad */ - const void *in; - void *out; - } u; - size_t length; - void *result; - - u.in = decoder_buffer_read(buffer, &length); - if (u.in == NULL) - return NULL; - - result = faacDecDecode(decoder, frame_info, - u.out -#ifdef HAVE_FAAD_BUFLEN_FUNCS - , length -#endif - ); - - return result; -} - -/** - * Get a song file's total playing time in seconds, as a float. - * Returns 0 if the duration is unknown, and a negative value if the - * file is invalid. - */ -static float -faad_get_file_time_float(struct input_stream *is) -{ - struct decoder_buffer *buffer; - float length; - faacDecHandle decoder; - faacDecConfigurationPtr config; - - buffer = decoder_buffer_new(NULL, is, - FAAD_MIN_STREAMSIZE * AAC_MAX_CHANNELS); - length = faad_song_duration(buffer, is); - - if (length < 0) { - bool ret; - struct audio_format audio_format; - - decoder = faacDecOpen(); - - config = faacDecGetCurrentConfiguration(decoder); - config->outputFormat = FAAD_FMT_16BIT; - faacDecSetConfiguration(decoder, config); - - decoder_buffer_fill(buffer); - - ret = faad_decoder_init(decoder, buffer, &audio_format, NULL); - if (ret) - length = 0; - - faacDecClose(decoder); - } - - decoder_buffer_free(buffer); - - return length; -} - -/** - * Get a song file's total playing time in seconds, as an int. - * Returns 0 if the duration is unknown, and a negative value if the - * file is invalid. - */ -static int -faad_get_file_time(struct input_stream *is) -{ - int file_time = -1; - float length; - - if ((length = faad_get_file_time_float(is)) >= 0) - file_time = length + 0.5; - - return file_time; -} - -static void -faad_stream_decode(struct decoder *mpd_decoder, struct input_stream *is) -{ - GError *error = NULL; - float total_time = 0; - faacDecHandle decoder; - struct audio_format audio_format; - faacDecConfigurationPtr config; - bool ret; - uint16_t bit_rate = 0; - struct decoder_buffer *buffer; - enum decoder_command cmd; - - buffer = decoder_buffer_new(mpd_decoder, is, - FAAD_MIN_STREAMSIZE * AAC_MAX_CHANNELS); - total_time = faad_song_duration(buffer, is); - - /* create the libfaad decoder */ - - decoder = faacDecOpen(); - - config = faacDecGetCurrentConfiguration(decoder); - config->outputFormat = FAAD_FMT_16BIT; -#ifdef HAVE_FAACDECCONFIGURATION_DOWNMATRIX - config->downMatrix = 1; -#endif -#ifdef HAVE_FAACDECCONFIGURATION_DONTUPSAMPLEIMPLICITSBR - config->dontUpSampleImplicitSBR = 0; -#endif - faacDecSetConfiguration(decoder, config); - - while (!decoder_buffer_is_full(buffer) && - !input_stream_eof(is) && - decoder_get_command(mpd_decoder) == DECODE_COMMAND_NONE) { - adts_find_frame(buffer); - decoder_buffer_fill(buffer); - } - - /* initialize it */ - - ret = faad_decoder_init(decoder, buffer, &audio_format, &error); - if (!ret) { - g_warning("%s", error->message); - g_error_free(error); - faacDecClose(decoder); - return; - } - - /* initialize the MPD core */ - - decoder_initialized(mpd_decoder, &audio_format, false, total_time); - - /* the decoder loop */ - - do { - size_t frame_size; - const void *decoded; - faacDecFrameInfo frame_info; - - /* find the next frame */ - - frame_size = adts_find_frame(buffer); - if (frame_size == 0) - /* end of file */ - break; - - /* decode it */ - - decoded = faad_decoder_decode(decoder, buffer, &frame_info); - - if (frame_info.error > 0) { - g_warning("error decoding AAC stream: %s\n", - faacDecGetErrorMessage(frame_info.error)); - break; - } - - if (frame_info.channels != audio_format.channels) { - g_warning("channel count changed from %u to %u", - audio_format.channels, frame_info.channels); - break; - } - -#ifdef HAVE_FAACDECFRAMEINFO_SAMPLERATE - if (frame_info.samplerate != audio_format.sample_rate) { - g_warning("sample rate changed from %u to %lu", - audio_format.sample_rate, - (unsigned long)frame_info.samplerate); - break; - } -#endif - - decoder_buffer_consume(buffer, frame_info.bytesconsumed); - - /* update bit rate and position */ - - 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, is, decoded, - (size_t)frame_info.samples * 2, - bit_rate); - } while (cmd != DECODE_COMMAND_STOP); - - /* cleanup */ - - faacDecClose(decoder); -} - -static struct tag * -faad_stream_tag(struct input_stream *is) -{ - int file_time = faad_get_file_time(is); - struct tag *tag; - - if (file_time < 0) - return NULL; - - tag = tag_new(); - tag->time = file_time; - return tag; -} - -static const char *const faad_suffixes[] = { "aac", NULL }; -static const char *const faad_mime_types[] = { - "audio/aac", "audio/aacp", NULL -}; - -const struct decoder_plugin faad_decoder_plugin = { - .name = "faad", - .stream_decode = faad_stream_decode, - .stream_tag = faad_stream_tag, - .suffixes = faad_suffixes, - .mime_types = faad_mime_types, -}; |