ref: b718267504c90df4854218b4ffe2d38a4e552da7
dir: /src/opusenc.c/
/* Copyright (C)2002-2017 Jean-Marc Valin
Copyright (C)2007-2013 Xiph.Org Foundation
Copyright (C)2008-2013 Gregory Maxwell
File: opusenc.c
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <opus_multistream.h>
#include "opusenc.h"
#include "opus_header.h"
#include "speex_resampler.h"
#include "picture.h"
#include "ogg_packer.h"
#define MAX_CHANNELS 8
#define LPC_PADDING 120
/* Allow up to 2 seconds for delayed decision. */
#define MAX_LOOKAHEAD 96000
/* We can't have a circular buffer (because of delayed decision), so let's not copy too often. */
#define BUFFER_EXTRA 24000
#define BUFFER_SAMPLES (MAX_LOOKAHEAD + BUFFER_EXTRA)
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#define MAX_PACKET_SIZE (1276*8)
#define USE_OGGP
struct StdioObject {
FILE *file;
};
typedef struct EncStream EncStream;
struct EncStream {
void *user_data;
#ifndef USE_OGGP
ogg_stream_state os;
#endif
int serialno_is_set;
int serialno;
int stream_is_init;
int packetno;
char *comment;
int comment_length;
int seen_file_icons;
int close_at_end;
int header_is_frozen;
ogg_int64_t end_granule;
ogg_int64_t granule_offset;
EncStream *next;
};
struct OggOpusEnc {
OpusMSEncoder *st;
#ifdef USE_OGGP
oggpacker *oggp;
#endif
int rate;
int channels;
float *buffer;
int buffer_start;
int buffer_end;
SpeexResamplerState *re;
int frame_size;
int decision_delay;
int max_ogg_delay;
int global_granule_offset;
ogg_int64_t curr_granule;
ogg_int64_t write_granule;
ogg_int64_t last_page_granule;
unsigned char *chaining_keyframe;
int chaining_keyframe_length;
OpusEncCallbacks callbacks;
ope_packet_func packet_callback;
OpusHeader header;
int comment_padding;
EncStream *streams;
EncStream *last_stream;
};
#ifdef USE_OGGP
static void output_pages(OggOpusEnc *enc) {
unsigned char *page;
int len;
while (oggp_get_next_page(enc->oggp, &page, &len)) {
enc->callbacks.write(enc->streams->user_data, page, len);
}
}
static void oe_flush_page(OggOpusEnc *enc) {
oggp_flush_page(enc->oggp);
output_pages(enc);
}
#else
static int oe_write_page(OggOpusEnc *enc, ogg_page *page, void *user_data)
{
int length;
int err;
err = enc->callbacks.write(user_data, page->header, page->header_len);
if (err) return -1;
err = enc->callbacks.write(user_data, page->body, page->body_len);
if (err) return -1;
length = page->header_len+page->body_len;
return length;
}
static void oe_flush_page(OggOpusEnc *enc) {
ogg_page og;
int ret;
while ( (ret = ogg_stream_flush_fill(&enc->streams->os, &og, 255*255))) {
if (ogg_page_packets(&og) != 0) enc->last_page_granule = ogg_page_granulepos(&og) + enc->streams->granule_offset;
ret = oe_write_page(enc, &og, enc->streams->user_data);
if (ret == -1) {
return;
}
}
}
#endif
int stdio_write(void *user_data, const unsigned char *ptr, int len) {
struct StdioObject *obj = (struct StdioObject*)user_data;
return fwrite(ptr, 1, len, obj->file) != (size_t)len;
}
int stdio_close(void *user_data) {
struct StdioObject *obj = (struct StdioObject*)user_data;
int ret = fclose(obj->file);
free(obj);
return ret;
}
static const OpusEncCallbacks stdio_callbacks = {
stdio_write,
stdio_close
};
/* Create a new OggOpus file. */
OggOpusEnc *ope_create_file(const char *path, int rate, int channels, int family, int *error) {
OggOpusEnc *enc;
struct StdioObject *obj;
obj = malloc(sizeof(*obj));
enc = ope_create_callbacks(&stdio_callbacks, obj, rate, channels, family, error);
if (enc == NULL || (error && *error)) {
return NULL;
}
obj->file = fopen(path, "wb");
if (!obj->file) {
if (error) *error = OPE_CANNOT_OPEN;
/* FIXME: Destroy the encoder properly. */
free(obj);
return NULL;
}
return enc;
}
EncStream *stream_create() {
EncStream *stream;
stream = malloc(sizeof(*stream));
if (!stream) return NULL;
stream->next = NULL;
stream->close_at_end = 1;
stream->serialno_is_set = 0;
stream->seen_file_icons = 0;
stream->stream_is_init = 0;
stream->header_is_frozen = 0;
stream->granule_offset = 0;
stream->comment = NULL;
comment_init(&stream->comment, &stream->comment_length, opus_get_version_string());
if (!stream->comment) goto fail;
{
char encoder_string[1024];
snprintf(encoder_string, sizeof(encoder_string), "%s version %s", PACKAGE_NAME, PACKAGE_VERSION);
comment_add(&stream->comment, &stream->comment_length, "ENCODER", encoder_string);
}
return stream;
fail:
if (stream->comment) free(stream->comment);
free(stream);
return NULL;
}
static void stream_destroy(EncStream *stream) {
if (stream->comment) free(stream->comment);
#ifndef USE_OGGP
if (stream->stream_is_init) ogg_stream_clear(&stream->os);
#endif
free(stream);
}
/* Create a new OggOpus file (callback-based). */
OggOpusEnc *ope_create_callbacks(const OpusEncCallbacks *callbacks, void *user_data,
int rate, int channels, int family, int *error) {
OpusMSEncoder *st=NULL;
OggOpusEnc *enc=NULL;
int ret;
if (family != 0 && family != 1 && family != 255) {
if (error) *error = OPE_UNIMPLEMENTED;
return NULL;
}
if (channels <= 0 || channels > 255) {
if (error) *error = OPE_BAD_ARG;
return NULL;
}
if (rate <= 0) {
if (error) *error = OPE_BAD_ARG;
return NULL;
}
if ( (enc = malloc(sizeof(*enc))) == NULL) goto fail;
enc->streams = NULL;
if ( (enc->streams = stream_create()) == NULL) goto fail;
enc->streams->next = NULL;
enc->last_stream = enc->streams;
#ifdef USE_OGGP
enc->oggp = NULL;
#endif
enc->packet_callback = NULL;
enc->rate = rate;
enc->channels = channels;
enc->frame_size = 960;
enc->decision_delay = 96000;
enc->max_ogg_delay = 48000;
enc->chaining_keyframe = NULL;
enc->chaining_keyframe_length = -1;
enc->comment_padding = 512;
enc->header.channels=channels;
enc->header.channel_mapping=family;
enc->header.input_sample_rate=rate;
enc->header.gain=0;
st=opus_multistream_surround_encoder_create(48000, channels, enc->header.channel_mapping,
&enc->header.nb_streams, &enc->header.nb_coupled,
enc->header.stream_map, OPUS_APPLICATION_AUDIO, &ret);
if (! (ret == OPUS_OK && st != NULL) ) {
goto fail;
}
if (rate != 48000) {
enc->re = speex_resampler_init(channels, rate, 48000, 5, NULL);
if (enc->re == NULL) goto fail;
speex_resampler_skip_zeros(enc->re);
} else {
enc->re = NULL;
}
opus_multistream_encoder_ctl(st, OPUS_SET_EXPERT_FRAME_DURATION(OPUS_FRAMESIZE_20_MS));
{
opus_int32 tmp;
int ret;
ret = opus_multistream_encoder_ctl(st, OPUS_GET_LOOKAHEAD(&tmp));
if (ret == OPUS_OK) enc->header.preskip = tmp;
else enc->header.preskip = 0;
enc->global_granule_offset = enc->header.preskip;
}
enc->curr_granule = 0;
enc->write_granule = 0;
enc->last_page_granule = 0;
if ( (enc->buffer = malloc(sizeof(*enc->buffer)*BUFFER_SAMPLES*channels)) == NULL) goto fail;
enc->buffer_start = enc->buffer_end = 0;
enc->st = st;
enc->callbacks = *callbacks;
enc->streams->user_data = user_data;
if (error) *error = OPE_OK;
return enc;
fail:
if (enc) {
free(enc);
if (enc->buffer) free(enc->buffer);
if (enc->streams) stream_destroy(enc->streams);
}
if (st) {
opus_multistream_encoder_destroy(st);
}
if (error) *error = OPE_ALLOC_FAIL;
return NULL;
}
static void init_stream(OggOpusEnc *enc) {
assert(!enc->streams->stream_is_init);
if (!enc->streams->serialno_is_set) {
enc->streams->serialno = rand();
}
#ifdef USE_OGGP
if (enc->oggp != NULL) oggp_chain(enc->oggp, enc->streams->serialno);
else {
enc->oggp = oggp_create(enc->streams->serialno);
/* FIXME: How the hell do we handle failure here? */
oggp_set_muxing_delay(enc->oggp, enc->max_ogg_delay);
}
#else
if (ogg_stream_init(&enc->streams->os, enc->streams->serialno) == -1) {
assert(0);
/* FIXME: How the hell do we handle that? */
}
#endif
comment_pad(&enc->streams->comment, &enc->streams->comment_length, enc->comment_padding);
/*Write header*/
{
#ifdef USE_OGGP
unsigned char *p;
p = oggp_get_packet_buffer(enc->oggp, 276);
int packet_size = opus_header_to_packet(&enc->header, p, 276);
oggp_commit_packet(enc->oggp, packet_size, 0, 0);
oe_flush_page(enc);
p = oggp_get_packet_buffer(enc->oggp, enc->streams->comment_length);
memcpy(p, enc->streams->comment, enc->streams->comment_length);
oggp_commit_packet(enc->oggp, enc->streams->comment_length, 0, 0);
oe_flush_page(enc);
#else
ogg_packet op;
/*The Identification Header is 19 bytes, plus a Channel Mapping Table for
mapping families other than 0. The Channel Mapping Table is 2 bytes +
1 byte per channel. Because the maximum number of channels is 255, the
maximum size of this header is 19 + 2 + 255 = 276 bytes.*/
unsigned char header_data[276];
int packet_size = opus_header_to_packet(&enc->header, header_data, sizeof(header_data));
op.packet=header_data;
op.bytes=packet_size;
op.b_o_s=1;
op.e_o_s=0;
op.granulepos=0;
op.packetno=0;
ogg_stream_packetin(&enc->streams->os, &op);
oe_flush_page(enc);
op.packet = (unsigned char *)enc->streams->comment;
op.bytes = enc->streams->comment_length;
op.b_o_s = 0;
op.e_o_s = 0;
op.granulepos = 0;
op.packetno = 1;
ogg_stream_packetin(&enc->streams->os, &op);
oe_flush_page(enc);
#endif
}
enc->streams->stream_is_init = 1;
enc->streams->packetno = 2;
}
static void shift_buffer(OggOpusEnc *enc) {
memmove(enc->buffer, &enc->buffer[enc->channels*enc->buffer_start], enc->channels*(enc->buffer_end-enc->buffer_start)*sizeof(*enc->buffer));
enc->buffer_end -= enc->buffer_start;
enc->buffer_start = 0;
}
static void encode_buffer(OggOpusEnc *enc) {
/* Round up when converting the granule pos because the decoder will round down. */
ogg_int64_t end_granule48k = (enc->streams->end_granule*48000 + enc->rate - 1)/enc->rate + enc->global_granule_offset;
while (enc->buffer_end-enc->buffer_start > enc->frame_size + enc->decision_delay) {
int cont;
opus_int32 pred;
int flush_needed;
ogg_packet op;
#ifndef USE_OGGP
ogg_page og;
#endif
int nbBytes;
unsigned char packet[MAX_PACKET_SIZE];
int is_keyframe=0;
opus_multistream_encoder_ctl(enc->st, OPUS_GET_PREDICTION_DISABLED(&pred));
/* FIXME: a frame that follows a keyframe generally doesn't need to be a keyframe
unless there's two consecutive stream boundaries. */
if (enc->curr_granule + 2*enc->frame_size>= end_granule48k && enc->streams->next) {
opus_multistream_encoder_ctl(enc->st, OPUS_SET_PREDICTION_DISABLED(1));
is_keyframe = 1;
}
nbBytes = opus_multistream_encode_float(enc->st, &enc->buffer[enc->channels*enc->buffer_start],
enc->buffer_end-enc->buffer_start, packet, MAX_PACKET_SIZE);
/* FIXME: How do we handle failure here. */
opus_multistream_encoder_ctl(enc->st, OPUS_SET_PREDICTION_DISABLED(pred));
assert(nbBytes > 0);
enc->curr_granule += enc->frame_size;
op.packet=packet;
op.bytes=nbBytes;
op.b_o_s=0;
op.packetno=enc->streams->packetno++;
do {
op.granulepos=enc->curr_granule-enc->streams->granule_offset;
op.e_o_s=enc->curr_granule >= end_granule48k;
cont = 0;
if (op.e_o_s) op.granulepos=end_granule48k-enc->streams->granule_offset;
#ifdef USE_OGGP
{
unsigned char *p;
p = oggp_get_packet_buffer(enc->oggp, MAX_PACKET_SIZE);
memcpy(p, packet, nbBytes);
oggp_commit_packet(enc->oggp, nbBytes, op.granulepos, op.e_o_s);
}
#else
ogg_stream_packetin(&enc->streams->os, &op);
#endif
if (enc->packet_callback) enc->packet_callback(enc->streams->user_data, op.packet, op.bytes, 0);
/* FIXME: Also flush on too many segments. */
#ifdef USE_OGGP
flush_needed = op.e_o_s;
if (flush_needed) oe_flush_page(enc);
else output_pages(enc);
#else
flush_needed = op.e_o_s || enc->curr_granule - enc->last_page_granule >= enc->max_ogg_delay;
if (flush_needed) {
oe_flush_page(enc);
} else {
while (ogg_stream_pageout_fill(&enc->streams->os, &og, 255*255)) {
if (ogg_page_packets(&og) != 0) enc->last_page_granule = ogg_page_granulepos(&og) + enc->streams->granule_offset;
int ret = oe_write_page(enc, &og, enc->streams->user_data);
/* FIXME: what do we do if this fails? */
assert(ret != -1);
}
}
#endif
if (op.e_o_s) {
EncStream *tmp;
tmp = enc->streams->next;
if (enc->streams->close_at_end) enc->callbacks.close(enc->streams->user_data);
stream_destroy(enc->streams);
enc->streams = tmp;
if (!tmp) enc->last_stream = NULL;
if (enc->last_stream == NULL) return;
/* We're done with this stream, start the next one. */
enc->header.preskip = end_granule48k + enc->frame_size - enc->curr_granule;
enc->streams->granule_offset = enc->curr_granule - enc->frame_size;
if (enc->chaining_keyframe) {
enc->header.preskip += enc->frame_size;
enc->streams->granule_offset -= enc->frame_size;
}
init_stream(enc);
if (enc->chaining_keyframe) {
ogg_packet op2;
op2.packet = enc->chaining_keyframe;
op2.bytes = enc->chaining_keyframe_length;
op2.b_o_s = 0;
op2.e_o_s = 0;
op2.packetno=enc->streams->packetno++;
op2.granulepos=enc->curr_granule - enc->streams->granule_offset - enc->frame_size;
#ifdef USE_OGGP
{
unsigned char *p;
p = oggp_get_packet_buffer(enc->oggp, MAX_PACKET_SIZE);
memcpy(p, enc->chaining_keyframe, enc->chaining_keyframe_length);
oggp_commit_packet(enc->oggp, enc->chaining_keyframe_length, op2.granulepos, 0);
}
#else
ogg_stream_packetin(&enc->streams->os, &op2);
#endif
if (enc->packet_callback) enc->packet_callback(enc->streams->user_data, op2.packet, op2.bytes, 0);
}
end_granule48k = (enc->streams->end_granule*48000 + enc->rate - 1)/enc->rate + enc->global_granule_offset;
cont = 1;
}
} while (cont);
if (enc->chaining_keyframe) free(enc->chaining_keyframe);
if (is_keyframe) {
enc->chaining_keyframe = malloc(nbBytes);
enc->chaining_keyframe_length = nbBytes;
memcpy(enc->chaining_keyframe, packet, nbBytes);
} else {
enc->chaining_keyframe = NULL;
enc->chaining_keyframe_length = -1;
}
enc->buffer_start += enc->frame_size;
}
/* If we've reached the end of the buffer, move everything back to the front. */
if (enc->buffer_end == BUFFER_SAMPLES) {
shift_buffer(enc);
}
/* This function must never leave the buffer full. */
assert(enc->buffer_end < BUFFER_SAMPLES);
}
/* Add/encode any number of float samples to the file. */
int ope_write_float(OggOpusEnc *enc, const float *pcm, int samples_per_channel) {
int channels = enc->channels;
enc->last_stream->header_is_frozen = 1;
if (!enc->streams->stream_is_init) init_stream(enc);
if (samples_per_channel < 0) return OPE_BAD_ARG;
enc->write_granule += samples_per_channel;
enc->last_stream->end_granule = enc->write_granule;
do {
int i;
spx_uint32_t in_samples, out_samples;
out_samples = BUFFER_SAMPLES-enc->buffer_end;
if (enc->re != NULL) {
in_samples = samples_per_channel;
speex_resampler_process_interleaved_float(enc->re, pcm, &in_samples, &enc->buffer[channels*enc->buffer_end], &out_samples);
} else {
int curr;
curr = MIN((spx_uint32_t)samples_per_channel, out_samples);
for (i=0;i<channels*curr;i++) {
enc->buffer[channels*enc->buffer_end+i] = pcm[i];
}
in_samples = out_samples = curr;
}
enc->buffer_end += out_samples;
pcm += in_samples*channels;
samples_per_channel -= in_samples;
encode_buffer(enc);
} while (samples_per_channel > 0);
return OPE_OK;
}
#define CONVERT_BUFFER 256
/* Add/encode any number of int16 samples to the file. */
int ope_write(OggOpusEnc *enc, const opus_int16 *pcm, int samples_per_channel) {
int channels = enc->channels;
enc->last_stream->header_is_frozen = 1;
if (!enc->streams->stream_is_init) init_stream(enc);
if (samples_per_channel < 0) return OPE_BAD_ARG;
enc->write_granule += samples_per_channel;
enc->last_stream->end_granule = enc->write_granule;
do {
int i;
spx_uint32_t in_samples, out_samples;
out_samples = BUFFER_SAMPLES-enc->buffer_end;
if (enc->re != NULL) {
float buf[CONVERT_BUFFER*MAX_CHANNELS];
in_samples = MIN(CONVERT_BUFFER, samples_per_channel);
for (i=0;i<channels*(int)in_samples;i++) {
buf[i] = (1.f/32768)*pcm[i];
}
speex_resampler_process_interleaved_float(enc->re, buf, &in_samples, &enc->buffer[channels*enc->buffer_end], &out_samples);
} else {
int curr;
curr = MIN((spx_uint32_t)samples_per_channel, out_samples);
for (i=0;i<channels*curr;i++) {
enc->buffer[channels*enc->buffer_end+i] = (1.f/32768)*pcm[i];
}
in_samples = out_samples = curr;
}
enc->buffer_end += out_samples;
pcm += in_samples*channels;
samples_per_channel -= in_samples;
encode_buffer(enc);
} while (samples_per_channel > 0);
return OPE_OK;
}
int ope_drain(OggOpusEnc *enc) {
/* FIXME: Use a better value. */
int pad_samples = 3000;
if (!enc->streams->stream_is_init) init_stream(enc);
shift_buffer(enc);
/* FIXME: Do LPC extension instead. */
memset(&enc->buffer[enc->channels*enc->buffer_end], 0, pad_samples*enc->channels);
enc->decision_delay = 0;
enc->buffer_end += pad_samples;
assert(enc->buffer_end <= BUFFER_SAMPLES);
encode_buffer(enc);
assert(enc->streams == NULL);
return OPE_OK;
}
/* Close/finalize the stream. */
void ope_destroy(OggOpusEnc *enc) {
/* FIXME: cleanup non-closed streams if any remain. */
if (enc->chaining_keyframe) free(enc->chaining_keyframe);
free(enc->buffer);
#ifdef USE_OGGP
oggp_destroy(enc->oggp);
#endif
opus_multistream_encoder_destroy(enc->st);
if (enc->re) speex_resampler_destroy(enc->re);
free(enc);
}
/* Ends the stream and create a new stream within the same file. */
int ope_chain_current(OggOpusEnc *enc) {
enc->last_stream->close_at_end = 0;
return ope_continue_new_callbacks(enc, enc->last_stream->user_data);
}
/* Ends the stream and create a new file. */
int ope_continue_new_file(OggOpusEnc *enc, const char *path) {
int ret;
struct StdioObject *obj;
if (!(obj = malloc(sizeof(*obj)))) return OPE_ALLOC_FAIL;
obj->file = fopen(path, "wb");
if (!obj->file) {
free(obj);
/* By trying to open the file first, we can recover if we can't open it. */
return OPE_CANNOT_OPEN;
}
ret = ope_continue_new_callbacks(enc, obj);
if (ret == OPE_OK) return ret;
fclose(obj->file);
free(obj);
return ret;
}
/* Ends the stream and create a new file (callback-based). */
int ope_continue_new_callbacks(OggOpusEnc *enc, void *user_data) {
EncStream *new_stream;
assert(enc->streams);
assert(enc->last_stream);
new_stream = stream_create();
if (!new_stream) return OPE_ALLOC_FAIL;
new_stream->user_data = user_data;
enc->last_stream->next = new_stream;
enc->last_stream = new_stream;
return OPE_OK;
}
/* Add a comment to the file (can only be called before encoding samples). */
int ope_add_comment(OggOpusEnc *enc, const char *tag, const char *val) {
if (enc->last_stream->header_is_frozen) return OPE_TOO_LATE;
if (enc->last_stream->stream_is_init) return OPE_TOO_LATE;
if (comment_add(&enc->last_stream->comment, &enc->last_stream->comment_length, tag, val)) return OPE_ALLOC_FAIL;
return OPE_OK;
}
int ope_add_picture(OggOpusEnc *enc, const char *spec) {
const char *error_message;
char *picture_data;
if (enc->last_stream->header_is_frozen) return OPE_TOO_LATE;
if (enc->last_stream->stream_is_init) return OPE_TOO_LATE;
picture_data = parse_picture_specification(spec, &error_message, &enc->last_stream->seen_file_icons);
if(picture_data==NULL){
/* FIXME: return proper errors rather than printing a message. */
fprintf(stderr,"Error parsing picture option: %s\n",error_message);
return OPE_BAD_ARG;
}
comment_add(&enc->last_stream->comment, &enc->last_stream->comment_length, "METADATA_BLOCK_PICTURE", picture_data);
free(picture_data);
return OPE_OK;
}
/* Sets the Opus comment vendor string (optional, defaults to library info). */
int ope_set_vendor_string(OggOpusEnc *enc, const char *vendor) {
if (enc->last_stream->header_is_frozen) return OPE_TOO_LATE;
if (enc->last_stream->stream_is_init) return OPE_TOO_LATE;
if (comment_replace_vendor_string(&enc->last_stream->comment, &enc->last_stream->comment_length, vendor)) return OPE_ALLOC_FAIL;
return OPE_OK;
}
int ope_flush_header(OggOpusEnc *enc) {
if (enc->last_stream->header_is_frozen) return OPE_TOO_LATE;
if (enc->last_stream->stream_is_init) return OPE_TOO_LATE;
else init_stream(enc);
return OPE_OK;
}
/* Goes straight to the libopus ctl() functions. */
int ope_encoder_ctl(OggOpusEnc *enc, int request, ...) {
int ret;
int translate;
va_list ap;
va_start(ap, request);
switch (request) {
case OPUS_SET_APPLICATION_REQUEST:
case OPUS_SET_BITRATE_REQUEST:
case OPUS_SET_MAX_BANDWIDTH_REQUEST:
case OPUS_SET_VBR_REQUEST:
case OPUS_SET_BANDWIDTH_REQUEST:
case OPUS_SET_COMPLEXITY_REQUEST:
case OPUS_SET_INBAND_FEC_REQUEST:
case OPUS_SET_PACKET_LOSS_PERC_REQUEST:
case OPUS_SET_DTX_REQUEST:
case OPUS_SET_VBR_CONSTRAINT_REQUEST:
case OPUS_SET_FORCE_CHANNELS_REQUEST:
case OPUS_SET_SIGNAL_REQUEST:
case OPUS_SET_LSB_DEPTH_REQUEST:
case OPUS_SET_PREDICTION_DISABLED_REQUEST:
#ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST
case OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST:
#endif
{
opus_int32 value = va_arg(ap, opus_int32);
ret = opus_multistream_encoder_ctl(enc->st, request, value);
}
break;
case OPUS_SET_EXPERT_FRAME_DURATION_REQUEST:
{
opus_int32 value = va_arg(ap, opus_int32);
int max_supported = OPUS_FRAMESIZE_60_MS;
#ifdef OPUS_FRAMESIZE_120_MS
max_supported = OPUS_FRAMESIZE_120_MS;
#endif
if (value < OPUS_FRAMESIZE_2_5_MS || value > max_supported) {
ret = OPUS_UNIMPLEMENTED;
break;
}
ret = opus_multistream_encoder_ctl(enc->st, request, value);
if (ret == OPUS_OK) {
if (value <= OPUS_FRAMESIZE_40_MS)
enc->frame_size = 120<<(value-OPUS_FRAMESIZE_2_5_MS);
else
enc->frame_size = (value-OPUS_FRAMESIZE_2_5_MS-2)*960;
}
}
break;
case OPUS_MULTISTREAM_GET_ENCODER_STATE_REQUEST:
{
opus_int32 stream_id;
OpusEncoder **value;
stream_id = va_arg(ap, opus_int32);
value = va_arg(ap, OpusEncoder**);
ret = opus_multistream_encoder_ctl(enc->st, request, stream_id, value);
}
break;
/* ****************** libopusenc-specific requests. ********************** */
case OPE_SET_DECISION_DELAY_REQUEST:
{
opus_int32 value = va_arg(ap, opus_int32);
if (value < 0) {
ret = OPE_BAD_ARG;
break;
}
enc->decision_delay = value;
ret = OPE_OK;
}
break;
case OPE_SET_MUXING_DELAY_REQUEST:
{
opus_int32 value = va_arg(ap, opus_int32);
if (value < 0) {
ret = OPE_BAD_ARG;
break;
}
enc->max_ogg_delay = value;
#ifdef USE_OGGP
oggp_set_muxing_delay(enc->oggp, enc->max_ogg_delay);
#endif
ret = OPE_OK;
}
break;
case OPE_SET_COMMENT_PADDING_REQUEST:
{
opus_int32 value = va_arg(ap, opus_int32);
if (value < 0) {
ret = OPE_BAD_ARG;
break;
}
enc->comment_padding = value;
ret = OPE_OK;
}
break;
case OPE_SET_SERIALNO_REQUEST:
{
opus_int32 value = va_arg(ap, opus_int32);
if (enc->last_stream->header_is_frozen) return OPE_TOO_LATE;
enc->last_stream->serialno = value;
enc->last_stream->serialno_is_set = 1;
ret = OPE_OK;
}
case OPE_SET_PACKET_CALLBACK_REQUEST:
{
ope_packet_func value = va_arg(ap, ope_packet_func);
enc->packet_callback = value;
ret = OPE_OK;
}
break;
default:
return OPE_UNIMPLEMENTED;
}
va_end(ap);
translate = request < 14000 || (ret < 0 && ret >= -10);
if (translate) {
if (ret == OPUS_BAD_ARG) ret = OPE_BAD_ARG;
else if (ret == OPUS_INTERNAL_ERROR) ret = OPE_INTERNAL_ERROR;
else if (ret == OPUS_UNIMPLEMENTED) ret = OPE_UNIMPLEMENTED;
else if (ret == OPUS_ALLOC_FAIL) ret = OPE_ALLOC_FAIL;
else ret = OPE_INTERNAL_ERROR;
}
assert(ret == 0 || ret < -10);
return ret;
}