* WMA compatible encoder
* Copyright (c) 2007 Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/attributes.h"
+
#include "avcodec.h"
+#include "internal.h"
#include "wma.h"
#undef NDEBUG
#include <assert.h>
-static int encode_init(AVCodecContext * avctx){
+static av_cold int encode_init(AVCodecContext *avctx)
+{
WMACodecContext *s = avctx->priv_data;
- int i, flags1, flags2;
+ int i, flags1, flags2, block_align;
uint8_t *extradata;
s->avctx = avctx;
- if(avctx->channels > MAX_CHANNELS)
- return -1;
+ if (avctx->channels > MAX_CHANNELS) {
+ av_log(avctx, AV_LOG_ERROR,
+ "too many channels: got %i, need %i or fewer",
+ avctx->channels, MAX_CHANNELS);
+ return AVERROR(EINVAL);
+ }
+
+ if (avctx->sample_rate > 48000) {
+ av_log(avctx, AV_LOG_ERROR, "sample rate is too high: %d > 48kHz",
+ avctx->sample_rate);
+ return AVERROR(EINVAL);
+ }
- if(avctx->bit_rate < 24*1000)
- return -1;
+ if (avctx->bit_rate < 24 * 1000) {
+ av_log(avctx, AV_LOG_ERROR,
+ "bitrate too low: got %i, need 24000 or higher\n",
+ avctx->bit_rate);
+ return AVERROR(EINVAL);
+ }
/* extract flag infos */
flags1 = 0;
flags2 = 1;
- if (avctx->codec->id == CODEC_ID_WMAV1) {
- extradata= av_malloc(4);
- avctx->extradata_size= 4;
+ if (avctx->codec->id == AV_CODEC_ID_WMAV1) {
+ extradata = av_malloc(4);
+ avctx->extradata_size = 4;
AV_WL16(extradata, flags1);
- AV_WL16(extradata+2, flags2);
- } else if (avctx->codec->id == CODEC_ID_WMAV2) {
- extradata= av_mallocz(10);
- avctx->extradata_size= 10;
+ AV_WL16(extradata + 2, flags2);
+ } else if (avctx->codec->id == AV_CODEC_ID_WMAV2) {
+ extradata = av_mallocz(10);
+ avctx->extradata_size = 10;
AV_WL32(extradata, flags1);
- AV_WL16(extradata+4, flags2);
- }else
+ AV_WL16(extradata + 4, flags2);
+ } else {
assert(0);
- avctx->extradata= extradata;
- s->use_exp_vlc = flags2 & 0x0001;
- s->use_bit_reservoir = flags2 & 0x0002;
+ }
+ avctx->extradata = extradata;
+ s->use_exp_vlc = flags2 & 0x0001;
+ s->use_bit_reservoir = flags2 & 0x0002;
s->use_variable_block_len = flags2 & 0x0004;
+ if (avctx->channels == 2)
+ s->ms_stereo = 1;
ff_wma_init(avctx, flags2);
/* init MDCT */
- for(i = 0; i < s->nb_block_sizes; i++)
- ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 0);
+ for (i = 0; i < s->nb_block_sizes; i++)
+ ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 0, 1.0);
- avctx->block_align=
- s->block_align= avctx->bit_rate*(int64_t)s->frame_len / (avctx->sample_rate*8);
-//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d\n", s->block_align, avctx->bit_rate, s->frame_len, avctx->sample_rate);
- avctx->frame_size= s->frame_len;
+ block_align = avctx->bit_rate * (int64_t) s->frame_len /
+ (avctx->sample_rate * 8);
+ block_align = FFMIN(block_align, MAX_CODED_SUPERFRAME_SIZE);
+ avctx->block_align = block_align;
+ avctx->bit_rate = avctx->block_align * 8LL * avctx->sample_rate /
+ s->frame_len;
+ avctx->frame_size = avctx->initial_padding = s->frame_len;
return 0;
}
-
-static void apply_window_and_mdct(AVCodecContext * avctx, signed short * audio, int len) {
+static void apply_window_and_mdct(AVCodecContext *avctx, const AVFrame *frame)
+{
WMACodecContext *s = avctx->priv_data;
- int window_index= s->frame_len_bits - s->block_len_bits;
- int i, j, channel;
- const float * win = s->windows[window_index];
- int window_len = 1 << s->block_len_bits;
- float n = window_len/2;
-
- for (channel = 0; channel < avctx->channels; channel++) {
- memcpy(s->output, s->frame_out[channel], sizeof(float)*window_len);
- j = channel;
- for (i = 0; i < len; i++, j += avctx->channels){
- s->output[i+window_len] = audio[j] / n * win[window_len - i - 1];
- s->frame_out[channel][i] = audio[j] / n * win[i];
- }
- ff_mdct_calc(&s->mdct_ctx[window_index], s->coefs[channel], s->output, s->mdct_tmp);
+ float **audio = (float **) frame->extended_data;
+ int len = frame->nb_samples;
+ int window_index = s->frame_len_bits - s->block_len_bits;
+ FFTContext *mdct = &s->mdct_ctx[window_index];
+ int ch;
+ const float *win = s->windows[window_index];
+ int window_len = 1 << s->block_len_bits;
+ float n = 2.0 * 32768.0 / window_len;
+
+ for (ch = 0; ch < avctx->channels; ch++) {
+ memcpy(s->output, s->frame_out[ch], window_len * sizeof(*s->output));
+ s->fdsp.vector_fmul_scalar(s->frame_out[ch], audio[ch], n, len);
+ s->fdsp.vector_fmul_reverse(&s->output[window_len], s->frame_out[ch],
+ win, len);
+ s->fdsp.vector_fmul(s->frame_out[ch], s->frame_out[ch], win, len);
+ mdct->mdct_calc(mdct, s->coefs[ch], s->output);
}
}
-//FIXME use for decoding too
-static void init_exp(WMACodecContext *s, int ch, const int *exp_param){
+// FIXME use for decoding too
+static void init_exp(WMACodecContext *s, int ch, const int *exp_param)
+{
int n;
const uint16_t *ptr;
float v, *q, max_scale, *q_end;
- ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
- q = s->exponents[ch];
- q_end = q + s->block_len;
+ ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
+ q = s->exponents[ch];
+ q_end = q + s->block_len;
max_scale = 0;
while (q < q_end) {
/* XXX: use a table */
- v = pow(10, *exp_param++ * (1.0 / 16.0));
- max_scale= FFMAX(max_scale, v);
- n = *ptr++;
+ v = pow(10, *exp_param++ *(1.0 / 16.0));
+ max_scale = FFMAX(max_scale, v);
+ n = *ptr++;
do {
*q++ = v;
} while (--n);
s->max_exponent[ch] = max_scale;
}
-static void encode_exp_vlc(WMACodecContext *s, int ch, const int *exp_param){
+static void encode_exp_vlc(WMACodecContext *s, int ch, const int *exp_param)
+{
int last_exp;
const uint16_t *ptr;
float *q, *q_end;
- ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
- q = s->exponents[ch];
+ ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
+ q = s->exponents[ch];
q_end = q + s->block_len;
if (s->version == 1) {
- last_exp= *exp_param++;
- assert(last_exp-10 >= 0 && last_exp-10 < 32);
+ last_exp = *exp_param++;
+ assert(last_exp - 10 >= 0 && last_exp - 10 < 32);
put_bits(&s->pb, 5, last_exp - 10);
- q+= *ptr++;
- }else
+ q += *ptr++;
+ } else
last_exp = 36;
while (q < q_end) {
- int exp = *exp_param++;
+ int exp = *exp_param++;
int code = exp - last_exp + 60;
assert(code >= 0 && code < 120);
- put_bits(&s->pb, ff_wma_scale_huffbits[code], ff_wma_scale_huffcodes[code]);
+ put_bits(&s->pb, ff_aac_scalefactor_bits[code],
+ ff_aac_scalefactor_code[code]);
/* XXX: use a table */
- q+= *ptr++;
- last_exp= exp;
+ q += *ptr++;
+ last_exp = exp;
}
}
-static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], int total_gain){
+static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE],
+ int total_gain)
+{
int v, bsize, ch, coef_nb_bits, parse_exponents;
float mdct_norm;
int nb_coefs[MAX_CHANNELS];
- static const int fixed_exp[25]={20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20};
-
- //FIXME remove duplication relative to decoder
+ static const int fixed_exp[25] = {
+ 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20
+ };
+
+ // FIXME remove duplication relative to decoder
if (s->use_variable_block_len) {
- assert(0); //FIXME not implemented
- }else{
+ assert(0); // FIXME not implemented
+ } else {
/* fixed block len */
s->next_block_len_bits = s->frame_len_bits;
s->prev_block_len_bits = s->frame_len_bits;
- s->block_len_bits = s->frame_len_bits;
+ s->block_len_bits = s->frame_len_bits;
}
s->block_len = 1 << s->block_len_bits;
// assert((s->block_pos + s->block_len) <= s->frame_len);
bsize = s->frame_len_bits - s->block_len_bits;
- //FIXME factor
+ // FIXME factor
v = s->coefs_end[bsize] - s->coefs_start;
- for(ch = 0; ch < s->nb_channels; ch++)
+ for (ch = 0; ch < s->avctx->channels; ch++)
nb_coefs[ch] = v;
{
int n4 = s->block_len / 2;
- mdct_norm = 1.0 / (float)n4;
- if (s->version == 1) {
+ mdct_norm = 1.0 / (float) n4;
+ if (s->version == 1)
mdct_norm *= sqrt(n4);
- }
}
- if (s->nb_channels == 2) {
- put_bits(&s->pb, 1, s->ms_stereo= 1);
- }
+ if (s->avctx->channels == 2)
+ put_bits(&s->pb, 1, !!s->ms_stereo);
- for(ch = 0; ch < s->nb_channels; ch++) {
- if (s->channel_coded[ch]= 1) { //FIXME only set channel_coded when needed, instead of always
+ for (ch = 0; ch < s->avctx->channels; ch++) {
+ // FIXME only set channel_coded when needed, instead of always
+ s->channel_coded[ch] = 1;
+ if (s->channel_coded[ch])
init_exp(s, ch, fixed_exp);
- }
}
- for(ch = 0; ch < s->nb_channels; ch++) {
+ for (ch = 0; ch < s->avctx->channels; ch++) {
if (s->channel_coded[ch]) {
- int16_t *coefs1;
+ WMACoef *coefs1;
float *coefs, *exponents, mult;
int i, n;
- coefs1 = s->coefs1[ch];
+ coefs1 = s->coefs1[ch];
exponents = s->exponents[ch];
- mult = pow(10, total_gain * 0.05) / s->max_exponent[ch];
- mult *= mdct_norm;
- coefs = src_coefs[ch];
+ mult = pow(10, total_gain * 0.05) / s->max_exponent[ch];
+ mult *= mdct_norm;
+ coefs = src_coefs[ch];
if (s->use_noise_coding && 0) {
- assert(0); //FIXME not implemented
+ assert(0); // FIXME not implemented
} else {
coefs += s->coefs_start;
- n = nb_coefs[ch];
- for(i = 0;i < n; i++){
- double t= *coefs++ / (exponents[i] * mult);
- if(t<-32768 || t>32767)
+ n = nb_coefs[ch];
+ for (i = 0; i < n; i++) {
+ double t = *coefs++ / (exponents[i] * mult);
+ if (t < -32768 || t > 32767)
return -1;
coefs1[i] = lrint(t);
}
v = 0;
- for(ch = 0; ch < s->nb_channels; ch++) {
+ for (ch = 0; ch < s->avctx->channels; ch++) {
int a = s->channel_coded[ch];
put_bits(&s->pb, 1, a);
v |= a;
if (!v)
return 1;
- for(v= total_gain-1; v>=127; v-= 127)
+ for (v = total_gain - 1; v >= 127; v -= 127)
put_bits(&s->pb, 7, 127);
put_bits(&s->pb, 7, v);
- coef_nb_bits= ff_wma_total_gain_to_bits(total_gain);
+ coef_nb_bits = ff_wma_total_gain_to_bits(total_gain);
if (s->use_noise_coding) {
- for(ch = 0; ch < s->nb_channels; ch++) {
+ for (ch = 0; ch < s->avctx->channels; ch++) {
if (s->channel_coded[ch]) {
int i, n;
n = s->exponent_high_sizes[bsize];
- for(i=0;i<n;i++) {
- put_bits(&s->pb, 1, s->high_band_coded[ch][i]= 0);
+ for (i = 0; i < n; i++) {
+ put_bits(&s->pb, 1, s->high_band_coded[ch][i] = 0);
if (0)
nb_coefs[ch] -= s->exponent_high_bands[bsize][i];
}
}
parse_exponents = 1;
- if (s->block_len_bits != s->frame_len_bits) {
+ if (s->block_len_bits != s->frame_len_bits)
put_bits(&s->pb, 1, parse_exponents);
- }
if (parse_exponents) {
- for(ch = 0; ch < s->nb_channels; ch++) {
+ for (ch = 0; ch < s->avctx->channels; ch++) {
if (s->channel_coded[ch]) {
if (s->use_exp_vlc) {
encode_exp_vlc(s, ch, fixed_exp);
} else {
- assert(0); //FIXME not implemented
+ assert(0); // FIXME not implemented
// encode_exp_lsp(s, ch);
}
}
}
- } else {
- assert(0); //FIXME not implemented
- }
+ } else
+ assert(0); // FIXME not implemented
- for(ch = 0; ch < s->nb_channels; ch++) {
+ for (ch = 0; ch < s->avctx->channels; ch++) {
if (s->channel_coded[ch]) {
int run, tindex;
- int16_t *ptr, *eptr;
+ WMACoef *ptr, *eptr;
tindex = (ch == 1 && s->ms_stereo);
- ptr = &s->coefs1[ch][0];
- eptr = ptr + nb_coefs[ch];
-
- run=0;
- for(;ptr < eptr; ptr++){
- if(*ptr){
- int level= *ptr;
- int abs_level= FFABS(level);
- int code= 0;
- if(abs_level <= s->coef_vlcs[tindex]->max_level){
- if(run < s->coef_vlcs[tindex]->levels[abs_level-1])
- code= run + s->int_table[tindex][abs_level-1];
- }
+ ptr = &s->coefs1[ch][0];
+ eptr = ptr + nb_coefs[ch];
+
+ run = 0;
+ for (; ptr < eptr; ptr++) {
+ if (*ptr) {
+ int level = *ptr;
+ int abs_level = FFABS(level);
+ int code = 0;
+ if (abs_level <= s->coef_vlcs[tindex]->max_level)
+ if (run < s->coef_vlcs[tindex]->levels[abs_level - 1])
+ code = run + s->int_table[tindex][abs_level - 1];
assert(code < s->coef_vlcs[tindex]->n);
- put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[code], s->coef_vlcs[tindex]->huffcodes[code]);
+ put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[code],
+ s->coef_vlcs[tindex]->huffcodes[code]);
- if(code == 0){
- if(1<<coef_nb_bits <= abs_level)
+ if (code == 0) {
+ if (1 << coef_nb_bits <= abs_level)
return -1;
put_bits(&s->pb, coef_nb_bits, abs_level);
put_bits(&s->pb, s->frame_len_bits, run);
}
- put_bits(&s->pb, 1, level < 0); //FIXME the sign is fliped somewhere
- run=0;
- }else{
+ // FIXME the sign is flipped somewhere
+ put_bits(&s->pb, 1, level < 0);
+ run = 0;
+ } else
run++;
- }
}
- if(run)
- put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[1], s->coef_vlcs[tindex]->huffcodes[1]);
- }
- if (s->version == 1 && s->nb_channels >= 2) {
- align_put_bits(&s->pb);
+ if (run)
+ put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[1],
+ s->coef_vlcs[tindex]->huffcodes[1]);
}
+ if (s->version == 1 && s->avctx->channels >= 2)
+ avpriv_align_put_bits(&s->pb);
}
return 0;
}
-static int encode_frame(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], uint8_t *buf, int buf_size, int total_gain){
+static int encode_frame(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE],
+ uint8_t *buf, int buf_size, int total_gain)
+{
init_put_bits(&s->pb, buf, buf_size);
- if (s->use_bit_reservoir) {
- assert(0);//FIXME not implemented
- }else{
- if(encode_block(s, src_coefs, total_gain) < 0)
- return INT_MAX;
- }
+ if (s->use_bit_reservoir)
+ assert(0); // FIXME not implemented
+ else if (encode_block(s, src_coefs, total_gain) < 0)
+ return INT_MAX;
- align_put_bits(&s->pb);
+ avpriv_align_put_bits(&s->pb);
- return put_bits_count(&s->pb)/8 - s->block_align;
+ return put_bits_count(&s->pb) / 8 - s->avctx->block_align;
}
-static int encode_superframe(AVCodecContext *avctx,
- unsigned char *buf, int buf_size, void *data){
+static int encode_superframe(AVCodecContext *avctx, AVPacket *avpkt,
+ const AVFrame *frame, int *got_packet_ptr)
+{
WMACodecContext *s = avctx->priv_data;
- short *samples = data;
- int i, total_gain;
+ int i, total_gain, ret;
- s->block_len_bits= s->frame_len_bits; //required by non variable block len
- s->block_len = 1 << s->block_len_bits;
+ s->block_len_bits = s->frame_len_bits; // required by non variable block len
+ s->block_len = 1 << s->block_len_bits;
- apply_window_and_mdct(avctx, samples, avctx->frame_size);
+ apply_window_and_mdct(avctx, frame);
if (s->ms_stereo) {
float a, b;
int i;
- for(i = 0; i < s->block_len; i++) {
- a = s->coefs[0][i]*0.5;
- b = s->coefs[1][i]*0.5;
+ for (i = 0; i < s->block_len; i++) {
+ a = s->coefs[0][i] * 0.5;
+ b = s->coefs[1][i] * 0.5;
s->coefs[0][i] = a + b;
s->coefs[1][i] = a - b;
}
}
+ if ((ret = ff_alloc_packet(avpkt, 2 * MAX_CODED_SUPERFRAME_SIZE))) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+ return ret;
+ }
+
#if 1
- total_gain= 128;
- for(i=64; i; i>>=1){
- int error= encode_frame(s, s->coefs, buf, buf_size, total_gain-i);
- if(error<0)
- total_gain-= i;
+ total_gain = 128;
+ for (i = 64; i; i >>= 1) {
+ int error = encode_frame(s, s->coefs, avpkt->data, avpkt->size,
+ total_gain - i);
+ if (error < 0)
+ total_gain -= i;
}
#else
- total_gain= 90;
- best= encode_frame(s, s->coefs, buf, buf_size, total_gain);
- for(i=32; i; i>>=1){
- int scoreL= encode_frame(s, s->coefs, buf, buf_size, total_gain-i);
- int scoreR= encode_frame(s, s->coefs, buf, buf_size, total_gain+i);
+ total_gain = 90;
+ best = encode_frame(s, s->coefs, avpkt->data, avpkt->size, total_gain);
+ for (i = 32; i; i >>= 1) {
+ int scoreL = encode_frame(s, s->coefs, avpkt->data, avpkt->size, total_gain - i);
+ int scoreR = encode_frame(s, s->coefs, avpkt->data, avpkt->size, total_gain + i);
av_log(NULL, AV_LOG_ERROR, "%d %d %d (%d)\n", scoreL, best, scoreR, total_gain);
- if(scoreL < FFMIN(best, scoreR)){
- best = scoreL;
+ if (scoreL < FFMIN(best, scoreR)) {
+ best = scoreL;
total_gain -= i;
- }else if(scoreR < best){
- best = scoreR;
+ } else if (scoreR < best) {
+ best = scoreR;
total_gain += i;
}
}
-#endif
+#endif /* 1 */
- encode_frame(s, s->coefs, buf, buf_size, total_gain);
+ if ((i = encode_frame(s, s->coefs, avpkt->data, avpkt->size, total_gain)) >= 0) {
+ av_log(avctx, AV_LOG_ERROR, "required frame size too large. please "
+ "use a higher bit rate.\n");
+ return AVERROR(EINVAL);
+ }
assert((put_bits_count(&s->pb) & 7) == 0);
- i= s->block_align - (put_bits_count(&s->pb)+7)/8;
- assert(i>=0);
- while(i--)
+ while (i++)
put_bits(&s->pb, 8, 'N');
flush_put_bits(&s->pb);
- return pbBufPtr(&s->pb) - s->pb.buf;
+
+ if (frame->pts != AV_NOPTS_VALUE)
+ avpkt->pts = frame->pts - ff_samples_to_time_base(avctx, avctx->initial_padding);
+
+ avpkt->size = avctx->block_align;
+ *got_packet_ptr = 1;
+ return 0;
}
-AVCodec wmav1_encoder =
-{
- "wmav1",
- CODEC_TYPE_AUDIO,
- CODEC_ID_WMAV1,
- sizeof(WMACodecContext),
- encode_init,
- encode_superframe,
- ff_wma_end,
+AVCodec ff_wmav1_encoder = {
+ .name = "wmav1",
+ .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_WMAV1,
+ .priv_data_size = sizeof(WMACodecContext),
+ .init = encode_init,
+ .encode2 = encode_superframe,
+ .close = ff_wma_end,
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
+ AV_SAMPLE_FMT_NONE },
};
-AVCodec wmav2_encoder =
-{
- "wmav2",
- CODEC_TYPE_AUDIO,
- CODEC_ID_WMAV2,
- sizeof(WMACodecContext),
- encode_init,
- encode_superframe,
- ff_wma_end,
+AVCodec ff_wmav2_encoder = {
+ .name = "wmav2",
+ .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_WMAV2,
+ .priv_data_size = sizeof(WMACodecContext),
+ .init = encode_init,
+ .encode2 = encode_superframe,
+ .close = ff_wma_end,
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
+ AV_SAMPLE_FMT_NONE },
};
projects / ffmpeg / blobdiff