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Diffstat (limited to 'src/decoder/faad_decoder_plugin.c')
-rw-r--r--src/decoder/faad_decoder_plugin.c515
1 files changed, 0 insertions, 515 deletions
diff --git a/src/decoder/faad_decoder_plugin.c b/src/decoder/faad_decoder_plugin.c
deleted file mode 100644
index 911f033b..00000000
--- a/src/decoder/faad_decoder_plugin.c
+++ /dev/null
@@ -1,515 +0,0 @@
-/*
- * Copyright (C) 2003-2011 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"
-#include "tag_handler.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_lock_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_lock_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 bool
-faad_scan_stream(struct input_stream *is,
- const struct tag_handler *handler, void *handler_ctx)
-{
- int file_time = faad_get_file_time(is);
-
- if (file_time < 0)
- return false;
-
- tag_handler_invoke_duration(handler, handler_ctx, file_time);
- return true;
-}
-
-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,
- .scan_stream = faad_scan_stream,
- .suffixes = faad_suffixes,
- .mime_types = faad_mime_types,
-};
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