void speex_encode_stereo_int(short *data, int frame_size, SpeexBits *bits)
{
int i;
/* FIXME: Do some dynamic allocation here */
float float_data[2*MAX_IN_SAMPLES];
for (i=0;i<2*frame_size;i++)
float_data[i] = data[i];
speex_encode_stereo(float_data, frame_size, bits);
}
static void close_output(void)
{
int i;
char cbits[MAX_FRAME_BYTES];
Speex_ctx *ctx = speex_ctx;
int nbBytes;
int ret;
if (ctx == NULL)
return;
if (dpm.fd < 0)
return;
/*
Write last frame
*/
if (speex_ctx != NULL) {
if ((ctx->ogg_packetid + 1) % ctx->nframes != 0) {
while ((ctx->ogg_packetid + 1) % ctx->nframes != 0) {
ctx->ogg_packetid++;
speex_bits_pack(&ctx->bits, 15, 5);
}
nbBytes = speex_bits_write(&ctx->bits, cbits, MAX_FRAME_BYTES);
ctx->op.packet = (unsigned char *)cbits;
ctx->op.bytes = nbBytes;
ctx->op.b_o_s = 0;
ctx->op.e_o_s = 1;
ctx->op.granulepos = (ctx->ogg_packetid + ctx->nframes) * ctx->frame_size;
ctx->op.packetno = 2 + ctx->ogg_packetid / ctx->nframes;
ogg_stream_packetin(&ctx->os, &ctx->op);
}
for (i = ctx->input_idx; i < ctx->frame_size * ctx->channels; i++) {
/* left is zero-cleaned */
ctx->input[i] = 0;
}
if (ctx->channels == 2)
speex_encode_stereo(ctx->input, ctx->frame_size, &ctx->bits);
/* Encode the frame */
speex_encode(ctx->state, ctx->input, &ctx->bits);
speex_bits_insert_terminator(&ctx->bits);
/* Copy the bits to an array of char that can be written */
nbBytes = speex_bits_write(&ctx->bits, cbits, MAX_FRAME_BYTES);
/* Flush all the bits in the struct so we can encode a new frame */
speex_bits_reset(&ctx->bits);
/* ogg packet setup */
ctx->op.packet = (unsigned char *)cbits;
ctx->op.bytes = nbBytes;
ctx->op.b_o_s = 0;
ctx->op.e_o_s = 1;
ctx->op.granulepos = (ctx->ogg_packetid + ctx->nframes) * ctx->frame_size;
ctx->op.packetno = 2 + ctx->ogg_packetid / ctx->nframes;
ogg_stream_packetin(&ctx->os, &ctx->op);
/* Write all new pages (most likely 0 or 1) */
while (ogg_stream_pageout(&ctx->os, &ctx->og)) {
ret = oe_write_page(&ctx->og, dpm.fd);
if (ret != ctx->og.header_len + ctx->og.body_len) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "failed writing header to output stream");
return;
}
else
ctx->out_bytes += ret;
}
ogg_stream_clear(&speex_ctx->os);
speex_bits_destroy(&speex_ctx->bits);
speex_encoder_destroy(speex_ctx->state);
close(dpm.fd);
dpm.fd = -1;
free(speex_ctx->input);
ctl->cmsg(CMSG_INFO, VERB_NORMAL, "Wrote %lu/%lu bytes(%g%% compressed)",
ctx->out_bytes, ctx->in_bytes, ((double)ctx->out_bytes / (double)ctx->in_bytes)) * 100.;
speex_ctx->input = NULL;
free(speex_ctx);
speex_ctx = NULL;
}
return;
}
static int output_data(char *buf, int32 nbytes)
{
char cbits[MAX_FRAME_BYTES];
Speex_ctx *ctx = speex_ctx;
int nbBytes;
int16 *s;
int i, j;
int ret;
int nbytes_left;
if (dpm.fd < 0)
return 0;
ctx->in_bytes += nbytes;
/*
Main encoding loop (one frame per iteration)
*/
nbytes_left = nbytes;
s = (int16 *)buf;
while (1) {
ctx->ogg_packetid++;
/*
packing 16 bit -> float sample
*/
for (i = ctx->input_idx; i < ctx->frame_size * ctx->channels; i++) {
/* stream is ended, and buffer is not full. wait next spooling */
if (nbytes_left < 0) {
/* canceling ogg packet */
ctx->ogg_packetid--;
return 0;
}
ctx->input[i] = *s++;
nbytes_left -= 2; /* -16 bit*/
ctx->input_idx++;
}
/*
buffer is full. encode now.
*/
ctx->input_idx = 0;
if (ctx->channels == 2)
speex_encode_stereo(ctx->input, ctx->frame_size, &ctx->bits);
/* Encode the frame */
speex_encode(ctx->state, ctx->input, &ctx->bits);
if ((ctx->ogg_packetid + 1) % ctx->nframes != 0)
continue;
speex_bits_insert_terminator(&ctx->bits);
/* Copy the bits to an array of char that can be written */
nbBytes = speex_bits_write(&ctx->bits, cbits, MAX_FRAME_BYTES);
/* Flush all the bits in the struct so we can encode a new frame */
speex_bits_reset(&ctx->bits);
/* ogg packet setup */
ctx->op.packet = (unsigned char *)cbits;
ctx->op.bytes = nbBytes;
ctx->op.b_o_s = 0;
ctx->op.e_o_s = 0;
ctx->op.granulepos = (ctx->ogg_packetid + ctx->nframes) * ctx->frame_size;
ctx->op.packetno = 2 + ctx->ogg_packetid / ctx->nframes;
ogg_stream_packetin(&ctx->os, &ctx->op);
/* Write all new pages (most likely 0 or 1) */
while (ogg_stream_pageout(&ctx->os, &ctx->og)) {
ret = oe_write_page(&ctx->og, dpm.fd);
if (ret != ctx->og.header_len + ctx->og.body_len) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "failed writing header to output stream");
return -1;
}
else
ctx->out_bytes += ret;
}
}
return 0;
}
