mirror of
https://github.com/sle118/squeezelite-esp32.git
synced 2025-12-09 21:17:18 +03:00
refactoring step 3 - components
squeezelite is a component platform_esp32 is the main
This commit is contained in:
philippe44
659
components/squeezelite/faad.c.nocompile
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659
components/squeezelite/faad.c.nocompile
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@@ -0,0 +1,659 @@
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/*
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* Squeezelite - lightweight headless squeezebox emulator
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*
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* (c) Adrian Smith 2012-2015, triode1@btinternet.com
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* Ralph Irving 2015-2017, ralph_irving@hotmail.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "squeezelite.h"
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#include <neaacdec.h>
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#if BYTES_PER_FRAME == 4
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#define ALIGN(n) (n)
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#else
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#define ALIGN(n) (n << 8)
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#endif
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#define WRAPBUF_LEN 2048
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struct chunk_table {
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u32_t sample, offset;
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};
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struct faad {
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NeAACDecHandle hAac;
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u8_t type;
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// following used for mp4 only
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u32_t consume;
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u32_t pos;
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u32_t sample;
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u32_t nextchunk;
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void *stsc;
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u32_t skip;
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u64_t samples;
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u64_t sttssamples;
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bool empty;
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struct chunk_table *chunkinfo;
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// faad symbols to be dynamically loaded
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#if !LINKALL
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NeAACDecConfigurationPtr (* NeAACDecGetCurrentConfiguration)(NeAACDecHandle);
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unsigned char (* NeAACDecSetConfiguration)(NeAACDecHandle, NeAACDecConfigurationPtr);
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NeAACDecHandle (* NeAACDecOpen)(void);
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void (* NeAACDecClose)(NeAACDecHandle);
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long (* NeAACDecInit)(NeAACDecHandle, unsigned char *, unsigned long, unsigned long *, unsigned char *);
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char (* NeAACDecInit2)(NeAACDecHandle, unsigned char *pBuffer, unsigned long, unsigned long *, unsigned char *);
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void *(* NeAACDecDecode)(NeAACDecHandle, NeAACDecFrameInfo *, unsigned char *, unsigned long);
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char *(* NeAACDecGetErrorMessage)(unsigned char);
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#endif
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};
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static struct faad *a;
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extern log_level loglevel;
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extern struct buffer *streambuf;
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extern struct buffer *outputbuf;
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extern struct streamstate stream;
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extern struct outputstate output;
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extern struct decodestate decode;
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extern struct processstate process;
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#define LOCK_S mutex_lock(streambuf->mutex)
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#define UNLOCK_S mutex_unlock(streambuf->mutex)
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#define LOCK_O mutex_lock(outputbuf->mutex)
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#define UNLOCK_O mutex_unlock(outputbuf->mutex)
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#if PROCESS
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#define LOCK_O_direct if (decode.direct) mutex_lock(outputbuf->mutex)
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#define UNLOCK_O_direct if (decode.direct) mutex_unlock(outputbuf->mutex)
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#define IF_DIRECT(x) if (decode.direct) { x }
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#define IF_PROCESS(x) if (!decode.direct) { x }
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#else
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#define LOCK_O_direct mutex_lock(outputbuf->mutex)
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#define UNLOCK_O_direct mutex_unlock(outputbuf->mutex)
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#define IF_DIRECT(x) { x }
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#define IF_PROCESS(x)
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#endif
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#if LINKALL
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#define NEAAC(h, fn, ...) (NeAACDec ## fn)(__VA_ARGS__)
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#else
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#define NEAAC(h, fn, ...) (h)->NeAACDec##fn(__VA_ARGS__)
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#endif
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// minimal code for mp4 file parsing to extract audio config and find media data
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// adapted from faad2/common/mp4ff
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u32_t mp4_desc_length(u8_t **buf) {
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u8_t b;
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u8_t num_bytes = 0;
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u32_t length = 0;
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do {
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b = **buf;
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*buf += 1;
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num_bytes++;
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length = (length << 7) | (b & 0x7f);
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} while ((b & 0x80) && num_bytes < 4);
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return length;
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}
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// read mp4 header to extract config data
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static int read_mp4_header(unsigned long *samplerate_p, unsigned char *channels_p) {
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size_t bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
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char type[5];
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u32_t len;
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while (bytes >= 8) {
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// count trak to find the first playable one
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static unsigned trak, play;
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u32_t consume;
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len = unpackN((u32_t *)streambuf->readp);
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memcpy(type, streambuf->readp + 4, 4);
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type[4] = '\0';
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if (!strcmp(type, "moov")) {
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trak = 0;
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play = 0;
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}
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if (!strcmp(type, "trak")) {
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trak++;
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}
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// extract audio config from within esds and pass to DecInit2
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if (!strcmp(type, "esds") && bytes > len) {
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unsigned config_len;
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u8_t *ptr = streambuf->readp + 12;
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if (*ptr++ == 0x03) {
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mp4_desc_length(&ptr);
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ptr += 4;
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} else {
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ptr += 3;
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}
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mp4_desc_length(&ptr);
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ptr += 13;
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if (*ptr++ != 0x05) {
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LOG_WARN("error parsing esds");
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return -1;
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}
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config_len = mp4_desc_length(&ptr);
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if (NEAAC(a, Init2, a->hAac, ptr, config_len, samplerate_p, channels_p) == 0) {
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LOG_DEBUG("playable aac track: %u", trak);
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play = trak;
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}
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}
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// extract the total number of samples from stts
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if (!strcmp(type, "stts") && bytes > len) {
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u32_t i;
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u8_t *ptr = streambuf->readp + 12;
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u32_t entries = unpackN((u32_t *)ptr);
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ptr += 4;
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for (i = 0; i < entries; ++i) {
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u32_t count = unpackN((u32_t *)ptr);
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u32_t size = unpackN((u32_t *)(ptr + 4));
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a->sttssamples += count * size;
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ptr += 8;
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}
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LOG_DEBUG("total number of samples contained in stts: " FMT_u64, a->sttssamples);
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}
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// stash sample to chunk info, assume it comes before stco
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if (!strcmp(type, "stsc") && bytes > len && !a->chunkinfo) {
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a->stsc = malloc(len - 12);
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if (a->stsc == NULL) {
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LOG_WARN("malloc fail");
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return -1;
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}
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memcpy(a->stsc, streambuf->readp + 12, len - 12);
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}
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// build offsets table from stco and stored stsc
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if (!strcmp(type, "stco") && bytes > len && play == trak) {
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u32_t i;
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// extract chunk offsets
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u8_t *ptr = streambuf->readp + 12;
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u32_t entries = unpackN((u32_t *)ptr);
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ptr += 4;
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a->chunkinfo = malloc(sizeof(struct chunk_table) * (entries + 1));
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if (a->chunkinfo == NULL) {
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LOG_WARN("malloc fail");
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return -1;
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}
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for (i = 0; i < entries; ++i) {
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a->chunkinfo[i].offset = unpackN((u32_t *)ptr);
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a->chunkinfo[i].sample = 0;
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ptr += 4;
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}
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a->chunkinfo[i].sample = 0;
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a->chunkinfo[i].offset = 0;
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// fill in first sample id for each chunk from stored stsc
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if (a->stsc) {
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u32_t stsc_entries = unpackN((u32_t *)a->stsc);
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u32_t sample = 0;
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u32_t last = 0, last_samples = 0;
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u8_t *ptr = (u8_t *)a->stsc + 4;
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while (stsc_entries--) {
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u32_t first = unpackN((u32_t *)ptr);
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u32_t samples = unpackN((u32_t *)(ptr + 4));
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if (last) {
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for (i = last - 1; i < first - 1; ++i) {
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a->chunkinfo[i].sample = sample;
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sample += last_samples;
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}
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}
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if (stsc_entries == 0) {
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for (i = first - 1; i < entries; ++i) {
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a->chunkinfo[i].sample = sample;
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sample += samples;
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}
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}
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last = first;
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last_samples = samples;
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ptr += 12;
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}
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free(a->stsc);
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a->stsc = NULL;
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}
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}
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// found media data, advance to start of first chunk and return
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if (!strcmp(type, "mdat")) {
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_buf_inc_readp(streambuf, 8);
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a->pos += 8;
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bytes -= 8;
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if (play) {
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LOG_DEBUG("type: mdat len: %u pos: %u", len, a->pos);
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if (a->chunkinfo && a->chunkinfo[0].offset > a->pos) {
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u32_t skip = a->chunkinfo[0].offset - a->pos;
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LOG_DEBUG("skipping: %u", skip);
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if (skip <= bytes) {
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_buf_inc_readp(streambuf, skip);
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a->pos += skip;
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} else {
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a->consume = skip;
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}
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}
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a->sample = a->nextchunk = 1;
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return 1;
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} else {
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LOG_DEBUG("type: mdat len: %u, no playable track found", len);
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return -1;
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}
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}
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// parse key-value atoms within ilst ---- entries to get encoder padding within iTunSMPB entry for gapless
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if (!strcmp(type, "----") && bytes > len) {
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u8_t *ptr = streambuf->readp + 8;
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u32_t remain = len - 8, size;
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if (!memcmp(ptr + 4, "mean", 4) && (size = unpackN((u32_t *)ptr)) < remain) {
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ptr += size; remain -= size;
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}
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if (!memcmp(ptr + 4, "name", 4) && (size = unpackN((u32_t *)ptr)) < remain && !memcmp(ptr + 12, "iTunSMPB", 8)) {
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ptr += size; remain -= size;
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}
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if (!memcmp(ptr + 4, "data", 4) && remain > 16 + 48) {
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// data is stored as hex strings: 0 start end samples
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u32_t b, c; u64_t d;
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if (sscanf((const char *)(ptr + 16), "%x %x %x " FMT_x64, &b, &b, &c, &d) == 4) {
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LOG_DEBUG("iTunSMPB start: %u end: %u samples: " FMT_u64, b, c, d);
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if (a->sttssamples && a->sttssamples < b + c + d) {
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LOG_DEBUG("reducing samples as stts count is less");
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d = a->sttssamples - (b + c);
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}
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a->skip = b;
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a->samples = d;
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}
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}
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}
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// default to consuming entire box
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consume = len;
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// read into these boxes so reduce consume
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if (!strcmp(type, "moov") || !strcmp(type, "trak") || !strcmp(type, "mdia") || !strcmp(type, "minf") || !strcmp(type, "stbl") ||
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!strcmp(type, "udta") || !strcmp(type, "ilst")) {
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consume = 8;
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}
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// special cases which mix mix data in the enclosing box which we want to read into
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if (!strcmp(type, "stsd")) consume = 16;
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if (!strcmp(type, "mp4a")) consume = 36;
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if (!strcmp(type, "meta")) consume = 12;
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// consume rest of box if it has been parsed (all in the buffer) or is not one we want to parse
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if (bytes >= consume) {
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LOG_DEBUG("type: %s len: %u consume: %u", type, len, consume);
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_buf_inc_readp(streambuf, consume);
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a->pos += consume;
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bytes -= consume;
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} else if ( !(!strcmp(type, "esds") || !strcmp(type, "stts") || !strcmp(type, "stsc") ||
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!strcmp(type, "stco") || !strcmp(type, "----")) ) {
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LOG_DEBUG("type: %s len: %u consume: %u - partial consume: %u", type, len, consume, bytes);
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_buf_inc_readp(streambuf, bytes);
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a->pos += bytes;
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a->consume = consume - bytes;
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break;
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} else {
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break;
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}
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}
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return 0;
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}
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static decode_state faad_decode(void) {
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size_t bytes_total;
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size_t bytes_wrap;
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static NeAACDecFrameInfo info;
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ISAMPLE_T *iptr;
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bool endstream;
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frames_t frames;
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LOCK_S;
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bytes_total = _buf_used(streambuf);
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bytes_wrap = min(bytes_total, _buf_cont_read(streambuf));
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if (stream.state <= DISCONNECT && !bytes_total) {
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UNLOCK_S;
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return DECODE_COMPLETE;
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}
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if (a->consume) {
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u32_t consume = min(a->consume, bytes_wrap);
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LOG_DEBUG("consume: %u of %u", consume, a->consume);
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_buf_inc_readp(streambuf, consume);
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a->pos += consume;
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a->consume -= consume;
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UNLOCK_S;
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return DECODE_RUNNING;
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}
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if (decode.new_stream) {
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int found = 0;
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static unsigned char channels;
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static unsigned long samplerate;
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if (a->type == '2') {
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// adts stream - seek for header
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while (bytes_wrap >= 2 && (*(streambuf->readp) != 0xFF || (*(streambuf->readp + 1) & 0xF6) != 0xF0)) {
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_buf_inc_readp(streambuf, 1);
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bytes_total--;
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bytes_wrap--;
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}
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if (bytes_wrap >= 2) {
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long n = NEAAC(a, Init, a->hAac, streambuf->readp, bytes_wrap, &samplerate, &channels);
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if (n < 0) {
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found = -1;
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} else {
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_buf_inc_readp(streambuf, n);
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found = 1;
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}
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}
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} else {
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// mp4 - read header
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found = read_mp4_header(&samplerate, &channels);
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}
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if (found == 1) {
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LOG_INFO("samplerate: %u channels: %u", samplerate, channels);
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bytes_total = _buf_used(streambuf);
|
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bytes_wrap = min(bytes_total, _buf_cont_read(streambuf));
|
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LOCK_O;
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LOG_INFO("setting track_start");
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output.next_sample_rate = decode_newstream(samplerate, output.supported_rates);
|
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IF_DSD( output.next_fmt = PCM; )
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output.track_start = outputbuf->writep;
|
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if (output.fade_mode) _checkfade(true);
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decode.new_stream = false;
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UNLOCK_O;
|
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|
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} else if (found == -1) {
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LOG_WARN("error reading stream header");
|
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UNLOCK_S;
|
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return DECODE_ERROR;
|
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|
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} else {
|
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|
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// not finished header parsing come back next time
|
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UNLOCK_S;
|
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return DECODE_RUNNING;
|
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}
|
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}
|
||||
|
||||
if (bytes_wrap < WRAPBUF_LEN && bytes_total > WRAPBUF_LEN) {
|
||||
|
||||
// make a local copy of frames which may have wrapped round the end of streambuf
|
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static u8_t buf[WRAPBUF_LEN];
|
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memcpy(buf, streambuf->readp, bytes_wrap);
|
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memcpy(buf + bytes_wrap, streambuf->buf, WRAPBUF_LEN - bytes_wrap);
|
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iptr = NEAAC(a, Decode, a->hAac, &info, buf, WRAPBUF_LEN);
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} else {
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iptr = NEAAC(a, Decode, a->hAac, &info, streambuf->readp, bytes_wrap);
|
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}
|
||||
|
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if (info.error) {
|
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LOG_WARN("error: %u %s", info.error, NEAAC(a, GetErrorMessage, info.error));
|
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}
|
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|
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endstream = false;
|
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|
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// mp4 end of chunk - skip to next offset
|
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if (a->chunkinfo && a->chunkinfo[a->nextchunk].offset && a->sample++ == a->chunkinfo[a->nextchunk].sample) {
|
||||
|
||||
if (a->chunkinfo[a->nextchunk].offset > a->pos) {
|
||||
u32_t skip = a->chunkinfo[a->nextchunk].offset - a->pos;
|
||||
if (skip != info.bytesconsumed) {
|
||||
LOG_DEBUG("skipping to next chunk pos: %u consumed: %u != skip: %u", a->pos, info.bytesconsumed, skip);
|
||||
}
|
||||
if (bytes_total >= skip) {
|
||||
_buf_inc_readp(streambuf, skip);
|
||||
a->pos += skip;
|
||||
} else {
|
||||
a->consume = skip;
|
||||
}
|
||||
a->nextchunk++;
|
||||
} else {
|
||||
LOG_ERROR("error: need to skip backwards!");
|
||||
endstream = true;
|
||||
}
|
||||
|
||||
// adts and mp4 when not at end of chunk
|
||||
} else if (info.bytesconsumed != 0) {
|
||||
|
||||
_buf_inc_readp(streambuf, info.bytesconsumed);
|
||||
a->pos += info.bytesconsumed;
|
||||
|
||||
// error which doesn't advance streambuf - end
|
||||
} else {
|
||||
endstream = true;
|
||||
}
|
||||
|
||||
UNLOCK_S;
|
||||
|
||||
if (endstream) {
|
||||
LOG_WARN("unable to decode further");
|
||||
return DECODE_ERROR;
|
||||
}
|
||||
|
||||
if (!info.samples) {
|
||||
a->empty = true;
|
||||
return DECODE_RUNNING;
|
||||
}
|
||||
|
||||
frames = info.samples / info.channels;
|
||||
|
||||
if (a->skip) {
|
||||
u32_t skip;
|
||||
if (a->empty) {
|
||||
a->empty = false;
|
||||
a->skip -= frames;
|
||||
LOG_DEBUG("gapless: first frame empty, skipped %u frames at start", frames);
|
||||
}
|
||||
skip = min(frames, a->skip);
|
||||
LOG_DEBUG("gapless: skipping %u frames at start", skip);
|
||||
frames -= skip;
|
||||
a->skip -= skip;
|
||||
iptr += skip * info.channels;
|
||||
}
|
||||
|
||||
if (a->samples) {
|
||||
if (a->samples < frames) {
|
||||
LOG_DEBUG("gapless: trimming %u frames from end", frames - a->samples);
|
||||
frames = (frames_t)a->samples;
|
||||
}
|
||||
a->samples -= frames;
|
||||
}
|
||||
|
||||
LOG_SDEBUG("write %u frames", frames);
|
||||
|
||||
LOCK_O_direct;
|
||||
|
||||
while (frames > 0) {
|
||||
frames_t f;
|
||||
frames_t count;
|
||||
ISAMPLE_T *optr;
|
||||
|
||||
IF_DIRECT(
|
||||
f = _buf_cont_write(outputbuf) / BYTES_PER_FRAME;
|
||||
optr = (ISAMPLE_T *)outputbuf->writep;
|
||||
);
|
||||
IF_PROCESS(
|
||||
f = process.max_in_frames;
|
||||
optr = (ISAMPLE_T *)process.inbuf;
|
||||
);
|
||||
|
||||
f = min(f, frames);
|
||||
count = f;
|
||||
|
||||
if (info.channels == 2) {
|
||||
#if BYTES_PER_FRAME == 4
|
||||
memcpy(optr, iptr, count * BYTES_PER_FRAME);
|
||||
iptr += count * 2;
|
||||
#else
|
||||
while (count--) {
|
||||
*optr++ = *iptr++ << 8;
|
||||
*optr++ = *iptr++ << 8;
|
||||
}
|
||||
#endif
|
||||
} else if (info.channels == 1) {
|
||||
while (count--) {
|
||||
*optr++ = ALIGN(*iptr);
|
||||
*optr++ = ALIGN(*iptr++);
|
||||
}
|
||||
} else {
|
||||
LOG_WARN("unsupported number of channels");
|
||||
}
|
||||
|
||||
frames -= f;
|
||||
|
||||
IF_DIRECT(
|
||||
_buf_inc_writep(outputbuf, f * BYTES_PER_FRAME);
|
||||
);
|
||||
IF_PROCESS(
|
||||
process.in_frames = f;
|
||||
if (frames) LOG_ERROR("unhandled case");
|
||||
);
|
||||
}
|
||||
|
||||
UNLOCK_O_direct;
|
||||
|
||||
return DECODE_RUNNING;
|
||||
}
|
||||
|
||||
static void faad_open(u8_t size, u8_t rate, u8_t chan, u8_t endianness) {
|
||||
NeAACDecConfigurationPtr conf;
|
||||
|
||||
LOG_INFO("opening %s stream", size == '2' ? "adts" : "mp4");
|
||||
|
||||
a->type = size;
|
||||
a->pos = a->consume = a->sample = a->nextchunk = 0;
|
||||
|
||||
if (a->chunkinfo) {
|
||||
free(a->chunkinfo);
|
||||
}
|
||||
if (a->stsc) {
|
||||
free(a->stsc);
|
||||
}
|
||||
a->chunkinfo = NULL;
|
||||
a->stsc = NULL;
|
||||
a->skip = 0;
|
||||
a->samples = 0;
|
||||
a->sttssamples = 0;
|
||||
a->empty = false;
|
||||
|
||||
if (a->hAac) {
|
||||
NEAAC(a, Close, a->hAac);
|
||||
}
|
||||
a->hAac = NEAAC(a, Open);
|
||||
|
||||
conf = NEAAC(a, GetCurrentConfiguration, a->hAac);
|
||||
|
||||
#if BYTES_PER_FRAME == 4
|
||||
conf->outputFormat = FAAD_FMT_16BIT;
|
||||
#else
|
||||
conf->outputFormat = FAAD_FMT_24BIT;
|
||||
#endif
|
||||
conf->defSampleRate = 44100;
|
||||
conf->downMatrix = 1;
|
||||
|
||||
if (!NEAAC(a, SetConfiguration, a->hAac, conf)) {
|
||||
LOG_WARN("error setting config");
|
||||
};
|
||||
}
|
||||
|
||||
static void faad_close(void) {
|
||||
NEAAC(a, Close, a->hAac);
|
||||
a->hAac = NULL;
|
||||
if (a->chunkinfo) {
|
||||
free(a->chunkinfo);
|
||||
a->chunkinfo = NULL;
|
||||
}
|
||||
if (a->stsc) {
|
||||
free(a->stsc);
|
||||
a->stsc = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static bool load_faad() {
|
||||
#if !LINKALL
|
||||
void *handle = dlopen(LIBFAAD, RTLD_NOW);
|
||||
char *err;
|
||||
|
||||
if (!handle) {
|
||||
LOG_INFO("dlerror: %s", dlerror());
|
||||
return false;
|
||||
}
|
||||
|
||||
a->NeAACDecGetCurrentConfiguration = dlsym(handle, "NeAACDecGetCurrentConfiguration");
|
||||
a->NeAACDecSetConfiguration = dlsym(handle, "NeAACDecSetConfiguration");
|
||||
a->NeAACDecOpen = dlsym(handle, "NeAACDecOpen");
|
||||
a->NeAACDecClose = dlsym(handle, "NeAACDecClose");
|
||||
a->NeAACDecInit = dlsym(handle, "NeAACDecInit");
|
||||
a->NeAACDecInit2 = dlsym(handle, "NeAACDecInit2");
|
||||
a->NeAACDecDecode = dlsym(handle, "NeAACDecDecode");
|
||||
a->NeAACDecGetErrorMessage = dlsym(handle, "NeAACDecGetErrorMessage");
|
||||
|
||||
if ((err = dlerror()) != NULL) {
|
||||
LOG_INFO("dlerror: %s", err);
|
||||
return false;
|
||||
}
|
||||
|
||||
LOG_INFO("loaded "LIBFAAD"");
|
||||
#endif
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
struct codec *register_faad(void) {
|
||||
static struct codec ret = {
|
||||
'a', // id
|
||||
"aac", // types
|
||||
WRAPBUF_LEN, // min read
|
||||
20480, // min space
|
||||
faad_open, // open
|
||||
faad_close, // close
|
||||
faad_decode, // decode
|
||||
};
|
||||
|
||||
a = malloc(sizeof(struct faad));
|
||||
if (!a) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
a->hAac = NULL;
|
||||
a->chunkinfo = NULL;
|
||||
a->stsc = NULL;
|
||||
|
||||
if (!load_faad()) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
LOG_INFO("using faad to decode aac");
|
||||
return &ret;
|
||||
}
|
||||
Reference in New Issue
Block a user