/*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file mp3dec_filter.c Paraslash's mp3 decoder. */
+#include <mad.h>
+#include <regex.h>
+#include <stdbool.h>
+
#include "para.h"
+#include "mp3dec_filter.cmdline.h"
#include "list.h"
#include "sched.h"
+#include "ggo.h"
+#include "buffer_tree.h"
#include "filter.h"
#include "error.h"
-#include <mad.h>
#include "string.h"
-/** The output buffer size. */
-#define MP3_OUTBUF_SIZE (128 * 1024)
-
/** Convert a sample value from libmad to a signed short. */
#define MAD_TO_SHORT(f) (f) >= MAD_F_ONE? SHRT_MAX :\
(f) <= -MAD_F_ONE? -SHRT_MAX : (signed short) ((f) >> (MAD_F_FRACBITS - 15))
+/** State of the decoding process. */
+enum mp3dec_flags {
+ /** Bad main_data_begin pointer encounterd. */
+ MP3DEC_FLAG_BAD_DATA = 1,
+ /** Some output has already been produced. */
+ MP3DEC_FLAG_DECODE_STARTED = 2,
+ MP3DEC_FLAG_NEED_MORE = 4,
+};
+
/** Data specific to the mp3dec filter. */
struct private_mp3dec_data {
/** Information on the current mp3 stream. */
struct mad_frame frame;
/** Contains the PCM output. */
struct mad_synth synth;
+ /** See \ref mp3dec_flags. */
+ unsigned flags;
+ /** Defer decoding until this time. */
+ struct timeval stream_start_barrier;
+ /** Wait until this many input bytes are available. */
+ size_t input_len_barrier;
+ /** The number of channels of the current stream. */
+ unsigned int channels;
+ /** Current sample rate in Hz. */
+ unsigned int samplerate;
};
-static ssize_t mp3dec(char *inbuffer, size_t len, struct filter_node *fn)
+static int need_bad_data_delay(struct private_mp3dec_data *pmd,
+ size_t bytes_available)
+{
+ if (!(pmd->flags & MP3DEC_FLAG_BAD_DATA))
+ return 0;
+ if (pmd->flags & MP3DEC_FLAG_DECODE_STARTED)
+ return 0;
+ if (bytes_available >= pmd->input_len_barrier)
+ return 0;
+ if (tv_diff(now, &pmd->stream_start_barrier, NULL) > 0)
+ return 0;
+ return 1;
+}
+
+/*
+ * Returns negative on serious errors, zero if the error should be ignored and
+ * positive on bad data pointer errors at stream start.
+ */
+static int handle_decode_error(struct private_mp3dec_data *pmd, size_t len)
{
+ const struct timeval delay = {0, 60 * 1000};
+ if (!MAD_RECOVERABLE(pmd->stream.error)
+ && pmd->stream.error != MAD_ERROR_BUFLEN) {
+ PARA_ERROR_LOG("%s\n", mad_stream_errorstr(&pmd->stream));
+ return -E_MAD_FRAME_DECODE;
+ }
+ PARA_DEBUG_LOG("%s\n", mad_stream_errorstr(&pmd->stream));
+ if (pmd->stream.error != MAD_ERROR_BADDATAPTR)
+ return 0;
+ if (pmd->flags & MP3DEC_FLAG_DECODE_STARTED)
+ return 0;
+ /*
+ * Bad data pointer at stream start. Defer decoding until the amount of
+ * data we are about to skip is available again, but wait at most 60ms.
+ */
+ pmd->flags |= MP3DEC_FLAG_BAD_DATA;
+ pmd->input_len_barrier = len;
+ tv_add(now, &delay, &pmd->stream_start_barrier);
+ return 1;
+}
+
+static size_t used_mad_buffer_bytes(struct mad_stream *s, size_t max)
+{
+ size_t rv;
+
+ if (!s->next_frame)
+ return max;
+ /* we still have some data */
+ rv = s->next_frame - s->buffer;
+ assert(rv <= max);
+ return rv;
+}
+
+static void mp3dec_close(struct filter_node *fn)
+{
+ struct private_mp3dec_data *pmd = fn->private_data;
+
+ mad_synth_finish(&pmd->synth);
+ mad_frame_finish(&pmd->frame);
+ mad_stream_finish(&pmd->stream);
+
+ free(pmd);
+ fn->private_data = NULL;
+}
+
+static void mp3dec_post_select(__a_unused struct sched *s, struct task *t)
+{
+ struct filter_node *fn = container_of(t, struct filter_node, task);
int i, ret;
struct private_mp3dec_data *pmd = fn->private_data;
- size_t copy = PARA_MIN(len, (size_t)4096);
+ struct btr_node *btrn = fn->btrn;
+ size_t loaded, used, len, iqs;
+ char *inbuffer, *outbuffer;
- if (fn->loaded > fn->bufsize * 4 / 5)
- return 0;
- mad_stream_buffer(&pmd->stream, (unsigned char *) inbuffer, copy);
+next_buffer:
pmd->stream.error = 0;
+ t->error = 0;
+ iqs = btr_get_input_queue_size(btrn);
+ ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
+ if (ret < 0)
+ goto err;
+ if (need_bad_data_delay(pmd, iqs))
+ return;
+ if (ret == 0)
+ return;
+ btr_merge(btrn, fn->min_iqs);
+ len = btr_next_buffer(btrn, &inbuffer);
+ mad_stream_buffer(&pmd->stream, (unsigned char *)inbuffer, len);
next_frame:
ret = mad_header_decode(&pmd->frame.header, &pmd->stream);
if (ret < 0) {
- if (pmd->stream.error != MAD_ERROR_BUFLEN &&
- pmd->stream.error != MAD_ERROR_LOSTSYNC)
+ used = used_mad_buffer_bytes(&pmd->stream, len);
+ btr_consume(btrn, used);
+ if (pmd->stream.error == MAD_ERROR_BUFLEN) {
+ if (len == iqs && btr_no_parent(btrn)) {
+ ret = -E_MP3DEC_EOF;
+ goto err;
+ }
+ fn->min_iqs += 100;
+ goto next_buffer;
+ } else if (pmd->stream.error != MAD_ERROR_LOSTSYNC)
PARA_DEBUG_LOG("header decode: %s\n",
mad_stream_errorstr(&pmd->stream));
- goto out;
+ goto next_buffer;
}
- fn->fc->samplerate = pmd->frame.header.samplerate;
- fn->fc->channels = MAD_NCHANNELS(&pmd->frame.header);
+ fn->min_iqs = 0;
+ pmd->samplerate = pmd->frame.header.samplerate;
+ pmd->channels = MAD_NCHANNELS(&pmd->frame.header);
ret = mad_frame_decode(&pmd->frame, &pmd->stream);
- if (ret) {
- if (MAD_RECOVERABLE(pmd->stream.error) ||
- pmd->stream.error == MAD_ERROR_BUFLEN) {
- PARA_DEBUG_LOG("frame decode: %s\n",
- mad_stream_errorstr(&pmd->stream));
- goto out;
- }
- PARA_ERROR_LOG("frame decode: %s\n",
- mad_stream_errorstr(&pmd->stream));
- return -E_MAD_FRAME_DECODE;
+ if (ret != 0) {
+ PARA_INFO_LOG("frame decode: %s\n", mad_stream_errorstr(&pmd->stream));
+ used = used_mad_buffer_bytes(&pmd->stream, len);
+ ret = handle_decode_error(pmd, used);
+ btr_consume(btrn, used);
+ if (ret < 0)
+ goto err;
+ if (ret == 0)
+ goto next_buffer;
+ return;
}
mad_synth_frame(&pmd->synth, &pmd->frame);
+ pmd->flags |= MP3DEC_FLAG_DECODE_STARTED;
+ outbuffer = para_malloc(pmd->synth.pcm.length * 4);
+ loaded = 0;
for (i = 0; i < pmd->synth.pcm.length; i++) {
- int s = MAD_TO_SHORT(pmd->synth.pcm.samples[0][i]);
- write_int16_host_endian(fn->buf + fn->loaded, s);
- fn->loaded += 2;
+ int sample = MAD_TO_SHORT(pmd->synth.pcm.samples[0][i]);
+ write_int16_host_endian(outbuffer + loaded, sample);
+ loaded += 2;
if (MAD_NCHANNELS(&pmd->frame.header) == 2) { /* stereo */
- s = MAD_TO_SHORT(pmd->synth.pcm.samples[1][i]);
- write_int16_host_endian(fn->buf + fn->loaded, s);
- fn->loaded += 2;
+ sample = MAD_TO_SHORT(pmd->synth.pcm.samples[1][i]);
+ write_int16_host_endian(outbuffer + loaded, sample);
+ loaded += 2;
}
- if (fn->loaded != fn->bufsize) /* output buffer not full */
- continue;
- PARA_ERROR_LOG("output buffer full: %zd\n", fn->loaded);
- return -E_MP3DEC_OVERRUN;
}
- if (fn->loaded <= fn->bufsize * 4 / 5)
- goto next_frame;
-out:
- if (pmd->stream.next_frame) { /* we still have some data */
- size_t off = pmd->stream.bufend - pmd->stream.next_frame;
-// PARA_INFO_LOG("off: %zd, rate: %u, returning %zd\n", off,
-// fn->fc->samplerate, copy - off);
- return copy - off;
- }
- return copy;
-}
-
-static void mp3dec_close(struct filter_node *fn)
-{
- struct private_mp3dec_data *pmd = fn->private_data;
-
- mad_synth_finish(&pmd->synth);
- mad_frame_finish(&pmd->frame);
- mad_stream_finish(&pmd->stream);
-
- free(fn->buf);
- fn->buf = NULL;
- free(pmd);
- fn->private_data = NULL;
+ btr_add_output(outbuffer, loaded, btrn);
+ goto next_frame;
+err:
+ assert(ret < 0);
+ t->error = ret;
+ btr_remove_node(btrn);
}
static void mp3dec_open(struct filter_node *fn)
{
struct private_mp3dec_data *pmd = para_calloc(sizeof(*pmd));
+ struct mp3dec_filter_args_info *mp3_conf = fn->conf;
fn->private_data = pmd;
mad_stream_init(&pmd->stream);
mad_frame_init(&pmd->frame);
mad_synth_init(&pmd->synth);
- fn->loaded = 0;
- fn->bufsize = MP3_OUTBUF_SIZE;
- fn->buf = para_calloc(fn->bufsize);
+ if (mp3_conf->ignore_crc_given)
+ mad_stream_options(&pmd->stream, MAD_OPTION_IGNORECRC);
}
+static int mp3dec_parse_config(int argc, char **argv, void **config)
+{
+ int ret;
+ struct mp3dec_filter_args_info *mp3_conf;
+
+ mp3_conf = para_calloc(sizeof(*mp3_conf));
+ ret = -E_MP3DEC_SYNTAX;
+ if (mp3dec_cmdline_parser(argc, argv, mp3_conf))
+ goto err;
+ *config = mp3_conf;
+ return 1;
+err:
+ free(mp3_conf);
+ return ret;
+}
+
+static int mp3dec_execute(struct btr_node *btrn, const char *cmd, char **result)
+{
+ struct filter_node *fn = btr_context(btrn);
+ struct private_mp3dec_data *pmd = fn->private_data;
+
+ if (!strcmp(cmd, "samplerate")) {
+ if (pmd->samplerate == 0)
+ return -ERRNO_TO_PARA_ERROR(ENAVAIL);
+ *result = make_message("%u", pmd->samplerate);
+ return 1;
+ }
+ if (!strcmp(cmd, "channels")) {
+ if (pmd->channels == 0)
+ return -ERRNO_TO_PARA_ERROR(ENAVAIL);
+ *result = make_message("%u", pmd->channels);
+ return 1;
+ }
+ return -ERRNO_TO_PARA_ERROR(ENOTSUP);
+}
+
+static void mp3dec_free_config(void *conf)
+{
+ mp3dec_cmdline_parser_free(conf);
+}
/**
* The init function of the mp3dec filter.
*
*/
void mp3dec_filter_init(struct filter *f)
{
+ struct mp3dec_filter_args_info dummy;
+
+ mp3dec_cmdline_parser_init(&dummy);
f->open = mp3dec_open;
- f->convert = mp3dec;
f->close = mp3dec_close;
+ f->parse_config = mp3dec_parse_config;
+ f->free_config = mp3dec_free_config;
+ f->pre_select = generic_filter_pre_select;
+ f->post_select = mp3dec_post_select;
+ f->execute = mp3dec_execute;
+ f->help = (struct ggo_help) {
+ .short_help = mp3dec_filter_args_info_help,
+ .detailed_help = mp3dec_filter_args_info_detailed_help
+ };
}
projects / paraslash.git / blobdiff