static av_cold int decode_init(AVCodecContext * avctx) {
NellyMoserDecodeContext *s = avctx->priv_data;
s->avctx = avctx;
av_init_random(0, &s->random_state);
ff_mdct_init(&s->imdct_ctx, 8, 1);
dsputil_init(&s->dsp, avctx);
if(s->dsp.float_to_int16 == ff_float_to_int16_c) {
s->add_bias = 385;
s->scale_bias = 1.0/(8*32768);
} else {
s->add_bias = 0;
s->scale_bias = 1.0/(1*8);
}
/* Generate overlap window */
if (!sine_window[0])
ff_sine_window_init(sine_window, 128);
avctx->sample_fmt = SAMPLE_FMT_S16;
avctx->channel_layout = CH_LAYOUT_MONO;
return 0;
}
static av_cold int decode_init(AVCodecContext * avctx) {
NellyMoserDecodeContext *s = avctx->priv_data;
int i;
s->avctx = avctx;
av_init_random(0, &s->random_state);
ff_mdct_init(&s->imdct_ctx, 8, 1);
dsputil_init(&s->dsp, avctx);
if(s->dsp.float_to_int16 == ff_float_to_int16_c) {
s->add_bias = 385;
s->scale_bias = 1.0/(8*32768);
} else {
s->add_bias = 0;
s->scale_bias = 1.0/(1*8);
}
/* Generate overlap window */
if (!sine_window[0])
for (i=0 ; i<128; i++) {
sine_window[i] = sin((i + 0.5) / 256.0 * M_PI);
}
return 0;
}
static int roq_encode_init(AVCodecContext *avctx)
{
RoqContext *enc = avctx->priv_data;
av_init_random(1, &enc->randctx);
enc->framesSinceKeyframe = 0;
if ((avctx->width & 0xf) || (avctx->height & 0xf)) {
av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n");
return -1;
}
if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1)))
av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two\n");
if (avcodec_check_dimensions(avctx, avctx->width, avctx->height)) {
av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n",
avctx->width, avctx->height);
return -1;
}
enc->width = avctx->width;
enc->height = avctx->height;
enc->framesSinceKeyframe = 0;
enc->first_frame = 1;
enc->last_frame = &enc->frames[0];
enc->current_frame = &enc->frames[1];
enc->this_motion4 =
av_mallocz((enc->width*enc->height/16)*sizeof(motion_vect));
enc->last_motion4 =
av_malloc ((enc->width*enc->height/16)*sizeof(motion_vect));
enc->this_motion8 =
av_mallocz((enc->width*enc->height/64)*sizeof(motion_vect));
enc->last_motion8 =
av_malloc ((enc->width*enc->height/64)*sizeof(motion_vect));
return 0;
}
static int cook_decode_init(AVCodecContext *avctx)
{
COOKContext *q = avctx->priv_data;
const uint8_t *edata_ptr = avctx->extradata;
/* Take care of the codec specific extradata. */
if (avctx->extradata_size <= 0) {
av_log(avctx,AV_LOG_ERROR,"Necessary extradata missing!\n");
return -1;
} else {
/* 8 for mono, 16 for stereo, ? for multichannel
Swap to right endianness so we don't need to care later on. */
av_log(avctx,AV_LOG_DEBUG,"codecdata_length=%d\n",avctx->extradata_size);
if (avctx->extradata_size >= 8){
q->cookversion = bytestream_get_be32(&edata_ptr);
q->samples_per_frame = bytestream_get_be16(&edata_ptr);
q->subbands = bytestream_get_be16(&edata_ptr);
}
if (avctx->extradata_size >= 16){
bytestream_get_be32(&edata_ptr); //Unknown unused
q->js_subband_start = bytestream_get_be16(&edata_ptr);
q->js_vlc_bits = bytestream_get_be16(&edata_ptr);
}
}
/* Take data from the AVCodecContext (RM container). */
q->sample_rate = avctx->sample_rate;
q->nb_channels = avctx->channels;
q->bit_rate = avctx->bit_rate;
/* Initialize RNG. */
av_init_random(1, &q->random_state);
/* Initialize extradata related variables. */
q->samples_per_channel = q->samples_per_frame / q->nb_channels;
q->bits_per_subpacket = avctx->block_align * 8;
/* Initialize default data states. */
q->log2_numvector_size = 5;
q->total_subbands = q->subbands;
/* Initialize version-dependent variables */
av_log(NULL,AV_LOG_DEBUG,"q->cookversion=%x\n",q->cookversion);
q->joint_stereo = 0;
switch (q->cookversion) {
case MONO:
if (q->nb_channels != 1) {
av_log(avctx,AV_LOG_ERROR,"Container channels != 1, report sample!\n");
return -1;
}
av_log(avctx,AV_LOG_DEBUG,"MONO\n");
break;
case STEREO:
if (q->nb_channels != 1) {
q->bits_per_subpacket = q->bits_per_subpacket/2;
}
av_log(avctx,AV_LOG_DEBUG,"STEREO\n");
break;
case JOINT_STEREO:
if (q->nb_channels != 2) {
av_log(avctx,AV_LOG_ERROR,"Container channels != 2, report sample!\n");
return -1;
}
av_log(avctx,AV_LOG_DEBUG,"JOINT_STEREO\n");
if (avctx->extradata_size >= 16){
q->total_subbands = q->subbands + q->js_subband_start;
q->joint_stereo = 1;
}
if (q->samples_per_channel > 256) {
q->log2_numvector_size = 6;
}
if (q->samples_per_channel > 512) {
q->log2_numvector_size = 7;
}
break;
case MC_COOK:
av_log(avctx,AV_LOG_ERROR,"MC_COOK not supported!\n");
return -1;
break;
default:
av_log(avctx,AV_LOG_ERROR,"Unknown Cook version, report sample!\n");
return -1;
break;
}
/* Initialize variable relations */
q->numvector_size = (1 << q->log2_numvector_size);
/* Generate tables */
init_pow2table();
init_gain_table(q);
init_cplscales_table(q);
if (init_cook_vlc_tables(q) != 0)
return -1;
if(avctx->block_align >= UINT_MAX/2)
return -1;
/* Pad the databuffer with:
DECODE_BYTES_PAD1 or DECODE_BYTES_PAD2 for decode_bytes(),
FF_INPUT_BUFFER_PADDING_SIZE, for the bitstreamreader. */
if (q->nb_channels==2 && q->joint_stereo==0) {
q->decoded_bytes_buffer =
av_mallocz(avctx->block_align/2
+ DECODE_BYTES_PAD2(avctx->block_align/2)
+ FF_INPUT_BUFFER_PADDING_SIZE);
} else {
q->decoded_bytes_buffer =
av_mallocz(avctx->block_align
+ DECODE_BYTES_PAD1(avctx->block_align)
+ FF_INPUT_BUFFER_PADDING_SIZE);
}
if (q->decoded_bytes_buffer == NULL)
return -1;
q->gains1.now = q->gain_1;
q->gains1.previous = q->gain_2;
q->gains2.now = q->gain_3;
q->gains2.previous = q->gain_4;
/* Initialize transform. */
if ( init_cook_mlt(q) != 0 )
return -1;
/* Initialize COOK signal arithmetic handling */
if (1) {
q->scalar_dequant = scalar_dequant_float;
q->decouple = decouple_float;
q->imlt_window = imlt_window_float;
q->interpolate = interpolate_float;
q->saturate_output = saturate_output_float;
}
/* Try to catch some obviously faulty streams, othervise it might be exploitable */
if (q->total_subbands > 53) {
av_log(avctx,AV_LOG_ERROR,"total_subbands > 53, report sample!\n");
return -1;
}
if (q->subbands > 50) {
av_log(avctx,AV_LOG_ERROR,"subbands > 50, report sample!\n");
return -1;
}
if ((q->samples_per_channel == 256) || (q->samples_per_channel == 512) || (q->samples_per_channel == 1024)) {
} else {
av_log(avctx,AV_LOG_ERROR,"unknown amount of samples_per_channel = %d, report sample!\n",q->samples_per_channel);
return -1;
}
if ((q->js_vlc_bits > 6) || (q->js_vlc_bits < 0)) {
av_log(avctx,AV_LOG_ERROR,"q->js_vlc_bits = %d, only >= 0 and <= 6 allowed!\n",q->js_vlc_bits);
return -1;
}
avctx->sample_fmt = SAMPLE_FMT_S16;
#ifdef COOKDEBUG
dump_cook_context(q);
#endif
return 0;
}
static int rtp_write_header(AVFormatContext *s1)
{
RTPMuxContext *s = s1->priv_data;
int payload_type, max_packet_size, n;
AVStream *st;
if (s1->nb_streams != 1)
return -1;
st = s1->streams[0];
payload_type = ff_rtp_get_payload_type(st->codec);
if (payload_type < 0)
payload_type = RTP_PT_PRIVATE; /* private payload type */
if (s1->rtp_pt > 0)
payload_type = s1->rtp_pt; /* private payload type */
s->payload_type = payload_type;
// following 2 FIXMEs could be set based on the current time, there is normally no info leak, as RTP will likely be transmitted immediately
if (random_state.index == 0)
av_init_random(av_gettime() + (getpid() << 16), &random_state);
//s->base_timestamp = 0; /* FIXME: was random(), what should this be? */
s->base_timestamp = av_random(&random_state);
s->timestamp = s->base_timestamp;
s->cur_timestamp = 0;
//s->ssrc = 0; /* FIXME: was random(), what should this be? */
s->ssrc = av_random(&random_state);
s->first_packet = 1;
s->first_rtcp_ntp_time = AV_NOPTS_VALUE;
max_packet_size = url_fget_max_packet_size(s1->pb);
if (max_packet_size <= 12)
return AVERROR(EIO);
s->buf = av_malloc(max_packet_size);
if (s->buf == NULL) {
return AVERROR(ENOMEM);
}
s->max_payload_size = max_packet_size - 12;
s->max_frames_per_packet = 0;
if (s1->max_delay) {
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
if (st->codec->frame_size == 0) {
av_log(s1, AV_LOG_ERROR, "Cannot respect max delay: frame size = 0\n");
} else {
s->max_frames_per_packet = av_rescale_rnd(s1->max_delay, st->codec->sample_rate, AV_TIME_BASE * st->codec->frame_size, AV_ROUND_DOWN);
}
}
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
/* FIXME: We should round down here... */
s->max_frames_per_packet = av_rescale_q(s1->max_delay, (AVRational){1, 1000000}, st->codec->time_base);
}
}
av_set_pts_info(st, 32, 1, 90000);
switch(st->codec->codec_id) {
case CODEC_ID_MP2:
case CODEC_ID_MP3:
s->buf_ptr = s->buf + 4;
break;
case CODEC_ID_MPEG1VIDEO:
case CODEC_ID_MPEG2VIDEO:
break;
case CODEC_ID_MPEG2TS:
n = s->max_payload_size / TS_PACKET_SIZE;
if (n < 1)
n = 1;
s->max_payload_size = n * TS_PACKET_SIZE;
s->buf_ptr = s->buf;
break;
case CODEC_ID_AAC:
s->num_frames = 0;
default:
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
av_set_pts_info(st, 32, 1, st->codec->sample_rate);
}
s->buf_ptr = s->buf;
break;
}
memset(s->stock_buf, 0, sizeof(s->stock_buf));
s->stock_len = 0;
return 0;
}
static av_cold int mpc8_decode_init(AVCodecContext * avctx)
{
int i;
MPCContext *c = avctx->priv_data;
GetBitContext gb;
static int vlc_initialized = 0;
if(avctx->extradata_size < 2){
av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
return -1;
}
memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
av_init_random(0xDEADBEEF, &c->rnd);
dsputil_init(&c->dsp, avctx);
ff_mpc_init();
init_get_bits(&gb, avctx->extradata, 16);
skip_bits(&gb, 3);//sample rate
c->maxbands = get_bits(&gb, 5) + 1;
skip_bits(&gb, 4);//channels
c->MSS = get_bits1(&gb);
c->frames = 1 << (get_bits(&gb, 3) * 2);
if(vlc_initialized) return 0;
av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
init_vlc(&band_vlc, MPC8_BANDS_BITS, MPC8_BANDS_SIZE,
mpc8_bands_bits, 1, 1,
mpc8_bands_codes, 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&q1_vlc, MPC8_Q1_BITS, MPC8_Q1_SIZE,
mpc8_q1_bits, 1, 1,
mpc8_q1_codes, 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&q9up_vlc, MPC8_Q9UP_BITS, MPC8_Q9UP_SIZE,
mpc8_q9up_bits, 1, 1,
mpc8_q9up_codes, 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&scfi_vlc[0], MPC8_SCFI0_BITS, MPC8_SCFI0_SIZE,
mpc8_scfi0_bits, 1, 1,
mpc8_scfi0_codes, 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&scfi_vlc[1], MPC8_SCFI1_BITS, MPC8_SCFI1_SIZE,
mpc8_scfi1_bits, 1, 1,
mpc8_scfi1_codes, 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&dscf_vlc[0], MPC8_DSCF0_BITS, MPC8_DSCF0_SIZE,
mpc8_dscf0_bits, 1, 1,
mpc8_dscf0_codes, 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&dscf_vlc[1], MPC8_DSCF1_BITS, MPC8_DSCF1_SIZE,
mpc8_dscf1_bits, 1, 1,
mpc8_dscf1_codes, 1, 1, INIT_VLC_USE_STATIC);
init_vlc_sparse(&q3_vlc[0], MPC8_Q3_BITS, MPC8_Q3_SIZE,
mpc8_q3_bits, 1, 1,
mpc8_q3_codes, 1, 1,
mpc8_q3_syms, 1, 1, INIT_VLC_USE_STATIC);
init_vlc_sparse(&q3_vlc[1], MPC8_Q4_BITS, MPC8_Q4_SIZE,
mpc8_q4_bits, 1, 1,
mpc8_q4_codes, 1, 1,
mpc8_q4_syms, 1, 1, INIT_VLC_USE_STATIC);
for(i = 0; i < 2; i++){
init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE,
&mpc8_res_bits[i], 1, 1,
&mpc8_res_codes[i], 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE,
&mpc8_q2_bits[i], 1, 1,
&mpc8_q2_codes[i], 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE,
&mpc8_q5_bits[i], 1, 1,
&mpc8_q5_codes[i], 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE,
&mpc8_q6_bits[i], 1, 1,
&mpc8_q6_codes[i], 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE,
&mpc8_q7_bits[i], 1, 1,
&mpc8_q7_codes[i], 1, 1, INIT_VLC_USE_STATIC);
init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE,
&mpc8_q8_bits[i], 1, 1,
&mpc8_q8_codes[i], 1, 1, INIT_VLC_USE_STATIC);
}
vlc_initialized = 1;
return 0;
}
