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-rw-r--r--src/decoder/FaadDecoderPlugin.cxx490
1 files changed, 0 insertions, 490 deletions
diff --git a/src/decoder/FaadDecoderPlugin.cxx b/src/decoder/FaadDecoderPlugin.cxx
deleted file mode 100644
index ae1181b4c..000000000
--- a/src/decoder/FaadDecoderPlugin.cxx
+++ /dev/null
@@ -1,490 +0,0 @@
-/*
- * Copyright (C) 2003-2013 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 "FaadDecoderPlugin.hxx"
-#include "DecoderAPI.hxx"
-#include "DecoderBuffer.hxx"
-#include "InputStream.hxx"
-#include "CheckAudioFormat.hxx"
-#include "tag/TagHandler.hxx"
-#include "util/Error.hxx"
-#include "util/Domain.hxx"
-#include "Log.hxx"
-
-#include <neaacdec.h>
-
-#include <assert.h>
-#include <string.h>
-#include <unistd.h>
-
-static const unsigned adts_sample_rates[] =
- { 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
- 16000, 12000, 11025, 8000, 7350, 0, 0, 0
-};
-
-static constexpr Domain faad_decoder_domain("faad_decoder");
-
-/**
- * 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(DecoderBuffer *buffer)
-{
- while (true) {
- size_t length;
- const uint8_t *data = (const uint8_t *)
- decoder_buffer_read(buffer, &length);
- if (data == nullptr || length < 8) {
- /* not enough data yet */
- if (!decoder_buffer_fill(buffer))
- /* failed */
- return 0;
-
- continue;
- }
-
- /* find the 0xff marker */
- const uint8_t *p = (const uint8_t *)memchr(data, 0xff, length);
- if (p == nullptr) {
- /* no marker - discard the buffer */
- decoder_buffer_clear(buffer);
- continue;
- }
-
- if (p > data) {
- /* discard data before 0xff */
- decoder_buffer_consume(buffer, p - data);
- continue;
- }
-
- /* is it a frame? */
- const size_t 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 */
- if (!decoder_buffer_fill(buffer)) {
- /* not enough data; discard this frame
- to prevent a possible buffer
- overflow */
- decoder_buffer_clear(buffer);
- }
-
- continue;
- }
-
- /* found a full frame! */
- return frame_length;
- }
-}
-
-static float
-adts_song_duration(DecoderBuffer *buffer)
-{
- const InputStream &is = decoder_buffer_get_stream(buffer);
- const bool estimate = !is.CheapSeeking();
- const auto file_size = is.GetSize();
- if (estimate && file_size <= 0)
- return -1;
-
- unsigned sample_rate = 0;
-
- /* Read all frames to ensure correct time and bitrate */
- unsigned frames;
- for (frames = 0;; frames++) {
- const unsigned frame_length = adts_find_frame(buffer);
- if (frame_length == 0)
- break;
-
-
- if (frames == 0) {
- size_t buffer_length;
- const uint8_t *data = (const uint8_t *)
- decoder_buffer_read(buffer, &buffer_length);
- assert(data != nullptr);
- assert(frame_length <= buffer_length);
-
- sample_rate = adts_sample_rates[(data[2] & 0x3c) >> 2];
- if (sample_rate == 0)
- break;
- }
-
- decoder_buffer_consume(buffer, frame_length);
-
- if (estimate && frames == 128) {
- /* if this is a remote file, don't slurp the
- whole file just for checking the song
- duration; instead, stop after some time and
- extrapolate the song duration from what we
- have until now */
-
- const auto offset = is.GetOffset()
- - decoder_buffer_available(buffer);
- if (offset <= 0)
- return -1;
-
- frames = (frames * file_size) / offset;
- break;
- }
- }
-
- if (sample_rate == 0)
- return -1;
-
- float frames_per_second = (float)sample_rate / 1024.0;
- assert(frames_per_second > 0);
-
- return (float)frames / frames_per_second;
-}
-
-static float
-faad_song_duration(DecoderBuffer *buffer, InputStream &is)
-{
- const auto size = is.GetSize();
- const size_t fileread = size >= 0 ? size : 0;
-
- decoder_buffer_fill(buffer);
- size_t length;
- const uint8_t *data = (const uint8_t *)
- decoder_buffer_read(buffer, &length);
- if (data == nullptr)
- return -1;
-
- size_t 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;
-
- const bool success = decoder_buffer_skip(buffer, tagsize) &&
- decoder_buffer_fill(buffer);
- if (!success)
- return -1;
-
- data = (const uint8_t *)decoder_buffer_read(buffer, &length);
- if (data == nullptr)
- return -1;
- }
-
- if (length >= 8 && adts_check_frame(data) > 0) {
- /* obtain the duration from the ADTS header */
-
- if (!is.IsSeekable())
- return -1;
-
- float song_length = adts_song_duration(buffer);
-
- is.LockSeek(tagsize, SEEK_SET, IgnoreError());
- decoder_buffer_clear(buffer);
-
- return song_length;
- } else if (length >= 5 && memcmp(data, "ADIF", 4) == 0) {
- /* obtain the duration from the ADIF header */
- size_t skip_size = (data[4] & 0x80) ? 9 : 0;
-
- if (8 + skip_size > length)
- /* not enough data yet; skip parsing this
- header */
- return -1;
-
- unsigned 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;
-}
-
-static NeAACDecHandle
-faad_decoder_new()
-{
- const NeAACDecHandle decoder = NeAACDecOpen();
-
- NeAACDecConfigurationPtr config =
- NeAACDecGetCurrentConfiguration(decoder);
- config->outputFormat = FAAD_FMT_16BIT;
- config->downMatrix = 1;
- config->dontUpSampleImplicitSBR = 0;
- NeAACDecSetConfiguration(decoder, config);
-
- return decoder;
-}
-
-/**
- * Wrapper for NeAACDecInit() which works around some API
- * inconsistencies in libfaad.
- */
-static bool
-faad_decoder_init(NeAACDecHandle decoder, DecoderBuffer *buffer,
- AudioFormat &audio_format, Error &error)
-{
-
- size_t length;
- const unsigned char *data = (const unsigned char *)
- decoder_buffer_read(buffer, &length);
- if (data == nullptr) {
- error.Set(faad_decoder_domain, "Empty file");
- return false;
- }
-
- uint8_t channels;
- unsigned long sample_rate;
- long nbytes = NeAACDecInit(decoder,
- /* deconst hack, libfaad requires this */
- const_cast<unsigned char *>(data),
- length,
- &sample_rate, &channels);
- if (nbytes < 0) {
- error.Set(faad_decoder_domain, "Not an AAC stream");
- return false;
- }
-
- decoder_buffer_consume(buffer, nbytes);
-
- return audio_format_init_checked(audio_format, sample_rate,
- SampleFormat::S16, channels, error);
-}
-
-/**
- * Wrapper for NeAACDecDecode() which works around some API
- * inconsistencies in libfaad.
- */
-static const void *
-faad_decoder_decode(NeAACDecHandle decoder, DecoderBuffer *buffer,
- NeAACDecFrameInfo *frame_info)
-{
- size_t length;
- const unsigned char *data = (const unsigned char *)
- decoder_buffer_read(buffer, &length);
- if (data == nullptr)
- return nullptr;
-
- return NeAACDecDecode(decoder, frame_info,
- /* deconst hack, libfaad requires this */
- const_cast<unsigned char *>(data),
- length);
-}
-
-/**
- * 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(InputStream &is)
-{
- DecoderBuffer *const buffer =
- decoder_buffer_new(nullptr, is,
- FAAD_MIN_STREAMSIZE * MAX_CHANNELS);
-
- float length = faad_song_duration(buffer, is);
-
- if (length < 0) {
- AudioFormat audio_format;
-
- NeAACDecHandle decoder = faad_decoder_new();
-
- decoder_buffer_fill(buffer);
-
- if (faad_decoder_init(decoder, buffer, audio_format,
- IgnoreError()))
- length = 0;
-
- NeAACDecClose(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(InputStream &is)
-{
- float length = faad_get_file_time_float(is);
- if (length < 0)
- return -1;
-
- return int(length + 0.5);
-}
-
-static void
-faad_stream_decode(Decoder &mpd_decoder, InputStream &is)
-{
- DecoderBuffer *const buffer =
- decoder_buffer_new(&mpd_decoder, is,
- FAAD_MIN_STREAMSIZE * MAX_CHANNELS);
-
- const float total_time = faad_song_duration(buffer, is);
-
- /* create the libfaad decoder */
-
- const NeAACDecHandle decoder = faad_decoder_new();
-
- while (!decoder_buffer_is_full(buffer) && !is.LockIsEOF() &&
- decoder_get_command(mpd_decoder) == DecoderCommand::NONE) {
- adts_find_frame(buffer);
- decoder_buffer_fill(buffer);
- }
-
- /* initialize it */
-
- Error error;
- AudioFormat audio_format;
- if (!faad_decoder_init(decoder, buffer, audio_format, error)) {
- LogError(error);
- NeAACDecClose(decoder);
- decoder_buffer_free(buffer);
- return;
- }
-
- /* initialize the MPD core */
-
- decoder_initialized(mpd_decoder, audio_format, false, total_time);
-
- /* the decoder loop */
-
- DecoderCommand cmd;
- uint16_t bit_rate = 0;
- do {
- /* find the next frame */
-
- const size_t frame_size = adts_find_frame(buffer);
- if (frame_size == 0)
- /* end of file */
- break;
-
- /* decode it */
-
- NeAACDecFrameInfo frame_info;
- const void *const decoded =
- faad_decoder_decode(decoder, buffer, &frame_info);
-
- if (frame_info.error > 0) {
- FormatWarning(faad_decoder_domain,
- "error decoding AAC stream: %s",
- NeAACDecGetErrorMessage(frame_info.error));
- break;
- }
-
- if (frame_info.channels != audio_format.channels) {
- FormatDefault(faad_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(faad_decoder_domain,
- "sample rate changed from %u to %lu",
- audio_format.sample_rate,
- (unsigned long)frame_info.samplerate);
- break;
- }
-
- 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 != DecoderCommand::STOP);
-
- /* cleanup */
-
- NeAACDecClose(decoder);
- decoder_buffer_free(buffer);
-}
-
-static bool
-faad_scan_stream(InputStream &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", nullptr };
-static const char *const faad_mime_types[] = {
- "audio/aac", "audio/aacp", nullptr
-};
-
-const struct DecoderPlugin faad_decoder_plugin = {
- "faad",
- nullptr,
- nullptr,
- faad_stream_decode,
- nullptr,
- nullptr,
- faad_scan_stream,
- nullptr,
- faad_suffixes,
- faad_mime_types,
-};
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-21 04:16:01 +0000