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/* |
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* WMA compatible encoder |
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* Copyright (c) 2007 Michael Niedermayer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/attributes.h" |
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#include "libavutil/ffmath.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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#include "wma.h" |
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#include "libavutil/avassert.h" |
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2 |
static av_cold int encode_init(AVCodecContext *avctx) |
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{ |
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2 |
WMACodecContext *s = avctx->priv_data; |
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int i, flags1, flags2, block_align; |
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uint8_t *extradata; |
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int ret; |
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2 |
s->avctx = avctx; |
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✗✓ |
2 |
if (avctx->channels > MAX_CHANNELS) { |
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av_log(avctx, AV_LOG_ERROR, |
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"too many channels: got %i, need %i or fewer\n", |
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avctx->channels, MAX_CHANNELS); |
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return AVERROR(EINVAL); |
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} |
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✗✓ |
2 |
if (avctx->sample_rate > 48000) { |
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av_log(avctx, AV_LOG_ERROR, "sample rate is too high: %d > 48kHz\n", |
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avctx->sample_rate); |
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return AVERROR(EINVAL); |
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} |
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✗✓ |
2 |
if (avctx->bit_rate < 24 * 1000) { |
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av_log(avctx, AV_LOG_ERROR, |
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"bitrate too low: got %"PRId64", need 24000 or higher\n", |
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avctx->bit_rate); |
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return AVERROR(EINVAL); |
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} |
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/* extract flag info */ |
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2 |
flags1 = 0; |
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flags2 = 1; |
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✓✓ |
2 |
if (avctx->codec->id == AV_CODEC_ID_WMAV1) { |
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1 |
extradata = av_malloc(4); |
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✗✓ |
1 |
if (!extradata) |
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return AVERROR(ENOMEM); |
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avctx->extradata_size = 4; |
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AV_WL16(extradata, flags1); |
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AV_WL16(extradata + 2, flags2); |
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✓✗ |
1 |
} else if (avctx->codec->id == AV_CODEC_ID_WMAV2) { |
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1 |
extradata = av_mallocz(10); |
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✗✓ |
1 |
if (!extradata) |
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return AVERROR(ENOMEM); |
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1 |
avctx->extradata_size = 10; |
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AV_WL32(extradata, flags1); |
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AV_WL16(extradata + 4, flags2); |
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} else { |
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av_assert0(0); |
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} |
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avctx->extradata = extradata; |
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s->use_exp_vlc = flags2 & 0x0001; |
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s->use_bit_reservoir = flags2 & 0x0002; |
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s->use_variable_block_len = flags2 & 0x0004; |
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✓✗ |
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if (avctx->channels == 2) |
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s->ms_stereo = 1; |
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✗✓ |
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if ((ret = ff_wma_init(avctx, flags2)) < 0) |
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return ret; |
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/* init MDCT */ |
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✓✓ |
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for (i = 0; i < s->nb_block_sizes; i++) |
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ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 0, 1.0); |
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block_align = avctx->bit_rate * (int64_t) s->frame_len / |
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(avctx->sample_rate * 8); |
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block_align = FFMIN(block_align, MAX_CODED_SUPERFRAME_SIZE); |
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avctx->block_align = block_align; |
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avctx->frame_size = avctx->initial_padding = s->frame_len; |
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return 0; |
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} |
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static int apply_window_and_mdct(AVCodecContext *avctx, const AVFrame *frame) |
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{ |
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WMACodecContext *s = avctx->priv_data; |
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float **audio = (float **) frame->extended_data; |
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int len = frame->nb_samples; |
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int window_index = s->frame_len_bits - s->block_len_bits; |
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FFTContext *mdct = &s->mdct_ctx[window_index]; |
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int ch; |
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const float *win = s->windows[window_index]; |
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int window_len = 1 << s->block_len_bits; |
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float n = 2.0 * 32768.0 / window_len; |
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✓✓ |
1230 |
for (ch = 0; ch < avctx->channels; ch++) { |
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memcpy(s->output, s->frame_out[ch], window_len * sizeof(*s->output)); |
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s->fdsp->vector_fmul_scalar(s->frame_out[ch], audio[ch], n, len); |
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s->fdsp->vector_fmul_reverse(&s->output[window_len], s->frame_out[ch], |
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win, len); |
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s->fdsp->vector_fmul(s->frame_out[ch], s->frame_out[ch], win, len); |
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mdct->mdct_calc(mdct, s->coefs[ch], s->output); |
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✗✓ |
820 |
if (!isfinite(s->coefs[ch][0])) { |
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av_log(avctx, AV_LOG_ERROR, "Input contains NaN/+-Inf\n"); |
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return AVERROR(EINVAL); |
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} |
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} |
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return 0; |
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} |
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// FIXME use for decoding too |
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6128 |
static void init_exp(WMACodecContext *s, int ch, const int *exp_param) |
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{ |
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int n; |
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const uint16_t *ptr; |
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float v, *q, max_scale, *q_end; |
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6128 |
ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits]; |
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6128 |
q = s->exponents[ch]; |
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6128 |
q_end = q + s->block_len; |
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6128 |
max_scale = 0; |
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✓✓ |
159328 |
while (q < q_end) { |
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/* XXX: use a table */ |
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153200 |
v = ff_exp10(*exp_param++ *(1.0 / 16.0)); |
145 |
✗✓ |
153200 |
max_scale = FFMAX(max_scale, v); |
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153200 |
n = *ptr++; |
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do { |
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12550144 |
*q++ = v; |
149 |
✓✓ |
12550144 |
} while (--n); |
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} |
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6128 |
s->max_exponent[ch] = max_scale; |
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6128 |
} |
153 |
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6128 |
static void encode_exp_vlc(WMACodecContext *s, int ch, const int *exp_param) |
155 |
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{ |
156 |
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int last_exp; |
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const uint16_t *ptr; |
158 |
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float *q, *q_end; |
159 |
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160 |
|
6128 |
ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits]; |
161 |
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6128 |
q = s->exponents[ch]; |
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6128 |
q_end = q + s->block_len; |
163 |
✓✓ |
6128 |
if (s->version == 1) { |
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|
3064 |
last_exp = *exp_param++; |
165 |
✓✗✗✓
|
3064 |
av_assert0(last_exp - 10 >= 0 && last_exp - 10 < 32); |
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3064 |
put_bits(&s->pb, 5, last_exp - 10); |
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3064 |
q += *ptr++; |
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} else |
169 |
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3064 |
last_exp = 36; |
170 |
✓✓ |
156264 |
while (q < q_end) { |
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150136 |
int exp = *exp_param++; |
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150136 |
int code = exp - last_exp + 60; |
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av_assert1(code >= 0 && code < 120); |
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150136 |
put_bits(&s->pb, ff_aac_scalefactor_bits[code], |
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150136 |
ff_aac_scalefactor_code[code]); |
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/* XXX: use a table */ |
177 |
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150136 |
q += *ptr++; |
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150136 |
last_exp = exp; |
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} |
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6128 |
} |
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3064 |
static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], |
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int total_gain) |
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{ |
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int v, bsize, ch, coef_nb_bits, parse_exponents; |
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float mdct_norm; |
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int nb_coefs[MAX_CHANNELS]; |
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static const int fixed_exp[25] = { |
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20, 20, 20, 20, 20, |
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20, 20, 20, 20, 20, |
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20, 20, 20, 20, 20, |
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20, 20, 20, 20, 20, |
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20, 20, 20, 20, 20 |
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}; |
195 |
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196 |
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// FIXME remove duplication relative to decoder |
197 |
✗✓ |
3064 |
if (s->use_variable_block_len) { |
198 |
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av_assert0(0); // FIXME not implemented |
199 |
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} else { |
200 |
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/* fixed block len */ |
201 |
|
3064 |
s->next_block_len_bits = s->frame_len_bits; |
202 |
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3064 |
s->prev_block_len_bits = s->frame_len_bits; |
203 |
|
3064 |
s->block_len_bits = s->frame_len_bits; |
204 |
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} |
205 |
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206 |
|
3064 |
s->block_len = 1 << s->block_len_bits; |
207 |
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// av_assert0((s->block_pos + s->block_len) <= s->frame_len); |
208 |
|
3064 |
bsize = s->frame_len_bits - s->block_len_bits; |
209 |
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210 |
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// FIXME factor |
211 |
|
3064 |
v = s->coefs_end[bsize] - s->coefs_start; |
212 |
✓✓ |
9192 |
for (ch = 0; ch < s->avctx->channels; ch++) |
213 |
|
6128 |
nb_coefs[ch] = v; |
214 |
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{ |
215 |
|
3064 |
int n4 = s->block_len / 2; |
216 |
|
3064 |
mdct_norm = 1.0 / (float) n4; |
217 |
✓✓ |
3064 |
if (s->version == 1) |
218 |
|
1532 |
mdct_norm *= sqrt(n4); |
219 |
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} |
220 |
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221 |
✓✗ |
3064 |
if (s->avctx->channels == 2) |
222 |
|
3064 |
put_bits(&s->pb, 1, !!s->ms_stereo); |
223 |
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|
224 |
✓✓ |
9192 |
for (ch = 0; ch < s->avctx->channels; ch++) { |
225 |
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// FIXME only set channel_coded when needed, instead of always |
226 |
|
6128 |
s->channel_coded[ch] = 1; |
227 |
✓✗ |
6128 |
if (s->channel_coded[ch]) |
228 |
|
6128 |
init_exp(s, ch, fixed_exp); |
229 |
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} |
230 |
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|
231 |
✓✓ |
9192 |
for (ch = 0; ch < s->avctx->channels; ch++) { |
232 |
✓✗ |
6128 |
if (s->channel_coded[ch]) { |
233 |
|
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WMACoef *coefs1; |
234 |
|
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float *coefs, *exponents, mult; |
235 |
|
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int i, n; |
236 |
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|
237 |
|
6128 |
coefs1 = s->coefs1[ch]; |
238 |
|
6128 |
exponents = s->exponents[ch]; |
239 |
|
6128 |
mult = ff_exp10(total_gain * 0.05) / s->max_exponent[ch]; |
240 |
|
6128 |
mult *= mdct_norm; |
241 |
|
6128 |
coefs = src_coefs[ch]; |
242 |
|
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if (s->use_noise_coding && 0) { |
243 |
|
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av_assert0(0); // FIXME not implemented |
244 |
|
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} else { |
245 |
|
6128 |
coefs += s->coefs_start; |
246 |
|
6128 |
n = nb_coefs[ch]; |
247 |
✓✓ |
11419528 |
for (i = 0; i < n; i++) { |
248 |
|
11413400 |
double t = *coefs++ / (exponents[i] * mult); |
249 |
✓✗✗✓
|
11413400 |
if (t < -32768 || t > 32767) |
250 |
|
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return -1; |
251 |
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|
252 |
|
11413400 |
coefs1[i] = lrint(t); |
253 |
|
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} |
254 |
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} |
255 |
|
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} |
256 |
|
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} |
257 |
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|
258 |
|
3064 |
v = 0; |
259 |
✓✓ |
9192 |
for (ch = 0; ch < s->avctx->channels; ch++) { |
260 |
|
6128 |
int a = s->channel_coded[ch]; |
261 |
|
6128 |
put_bits(&s->pb, 1, a); |
262 |
|
6128 |
v |= a; |
263 |
|
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} |
264 |
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|
265 |
✗✓ |
3064 |
if (!v) |
266 |
|
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return 1; |
267 |
|
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|
268 |
✗✓ |
3064 |
for (v = total_gain - 1; v >= 127; v -= 127) |
269 |
|
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put_bits(&s->pb, 7, 127); |
270 |
|
3064 |
put_bits(&s->pb, 7, v); |
271 |
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|
272 |
|
3064 |
coef_nb_bits = ff_wma_total_gain_to_bits(total_gain); |
273 |
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|
274 |
✗✓ |
3064 |
if (s->use_noise_coding) { |
275 |
|
|
for (ch = 0; ch < s->avctx->channels; ch++) { |
276 |
|
|
if (s->channel_coded[ch]) { |
277 |
|
|
int i, n; |
278 |
|
|
n = s->exponent_high_sizes[bsize]; |
279 |
|
|
for (i = 0; i < n; i++) { |
280 |
|
|
put_bits(&s->pb, 1, s->high_band_coded[ch][i] = 0); |
281 |
|
|
if (0) |
282 |
|
|
nb_coefs[ch] -= s->exponent_high_bands[bsize][i]; |
283 |
|
|
} |
284 |
|
|
} |
285 |
|
|
} |
286 |
|
|
} |
287 |
|
|
|
288 |
|
3064 |
parse_exponents = 1; |
289 |
✗✓ |
3064 |
if (s->block_len_bits != s->frame_len_bits) |
290 |
|
|
put_bits(&s->pb, 1, parse_exponents); |
291 |
|
|
|
292 |
✓✗ |
3064 |
if (parse_exponents) { |
293 |
✓✓ |
9192 |
for (ch = 0; ch < s->avctx->channels; ch++) { |
294 |
✓✗ |
6128 |
if (s->channel_coded[ch]) { |
295 |
✓✗ |
6128 |
if (s->use_exp_vlc) { |
296 |
|
6128 |
encode_exp_vlc(s, ch, fixed_exp); |
297 |
|
|
} else { |
298 |
|
|
av_assert0(0); // FIXME not implemented |
299 |
|
|
// encode_exp_lsp(s, ch); |
300 |
|
|
} |
301 |
|
|
} |
302 |
|
|
} |
303 |
|
|
} else |
304 |
|
|
av_assert0(0); // FIXME not implemented |
305 |
|
|
|
306 |
✓✓ |
8435 |
for (ch = 0; ch < s->avctx->channels; ch++) { |
307 |
✓✗ |
5755 |
if (s->channel_coded[ch]) { |
308 |
|
|
int run, tindex; |
309 |
|
|
WMACoef *ptr, *eptr; |
310 |
✓✓✓✗
|
5755 |
tindex = (ch == 1 && s->ms_stereo); |
311 |
|
5755 |
ptr = &s->coefs1[ch][0]; |
312 |
|
5755 |
eptr = ptr + nb_coefs[ch]; |
313 |
|
|
|
314 |
|
5755 |
run = 0; |
315 |
✓✓ |
10012817 |
for (; ptr < eptr; ptr++) { |
316 |
✓✓ |
10007446 |
if (*ptr) { |
317 |
|
2918406 |
int level = *ptr; |
318 |
|
2918406 |
int abs_level = FFABS(level); |
319 |
|
2918406 |
int code = 0; |
320 |
✓✓ |
2918406 |
if (abs_level <= s->coef_vlcs[tindex]->max_level) |
321 |
✓✓ |
2889049 |
if (run < s->coef_vlcs[tindex]->levels[abs_level - 1]) |
322 |
|
2884295 |
code = run + s->int_table[tindex][abs_level - 1]; |
323 |
|
|
|
324 |
|
|
av_assert2(code < s->coef_vlcs[tindex]->n); |
325 |
|
2918406 |
put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[code], |
326 |
|
2918406 |
s->coef_vlcs[tindex]->huffcodes[code]); |
327 |
|
|
|
328 |
✓✓ |
2918406 |
if (code == 0) { |
329 |
✓✓ |
34111 |
if (1 << coef_nb_bits <= abs_level) |
330 |
|
384 |
return -1; |
331 |
|
|
|
332 |
|
33727 |
put_bits(&s->pb, coef_nb_bits, abs_level); |
333 |
|
33727 |
put_bits(&s->pb, s->frame_len_bits, run); |
334 |
|
|
} |
335 |
|
|
// FIXME the sign is flipped somewhere |
336 |
|
2918022 |
put_bits(&s->pb, 1, level < 0); |
337 |
|
2918022 |
run = 0; |
338 |
|
|
} else |
339 |
|
7089040 |
run++; |
340 |
|
|
} |
341 |
✓✓ |
5371 |
if (run) |
342 |
|
5152 |
put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[1], |
343 |
|
5152 |
s->coef_vlcs[tindex]->huffcodes[1]); |
344 |
|
|
} |
345 |
✓✓✓✗
|
5371 |
if (s->version == 1 && s->avctx->channels >= 2) |
346 |
|
2803 |
align_put_bits(&s->pb); |
347 |
|
|
} |
348 |
|
2680 |
return 0; |
349 |
|
|
} |
350 |
|
|
|
351 |
|
3064 |
static int encode_frame(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], |
352 |
|
|
uint8_t *buf, int buf_size, int total_gain) |
353 |
|
|
{ |
354 |
|
3064 |
init_put_bits(&s->pb, buf, buf_size); |
355 |
|
|
|
356 |
✗✓ |
3064 |
if (s->use_bit_reservoir) |
357 |
|
|
av_assert0(0); // FIXME not implemented |
358 |
✓✓ |
3064 |
else if (encode_block(s, src_coefs, total_gain) < 0) |
359 |
|
384 |
return INT_MAX; |
360 |
|
|
|
361 |
|
2680 |
align_put_bits(&s->pb); |
362 |
|
|
|
363 |
|
2680 |
return put_bits_count(&s->pb) / 8 - s->avctx->block_align; |
364 |
|
|
} |
365 |
|
|
|
366 |
|
410 |
static int encode_superframe(AVCodecContext *avctx, AVPacket *avpkt, |
367 |
|
|
const AVFrame *frame, int *got_packet_ptr) |
368 |
|
|
{ |
369 |
|
410 |
WMACodecContext *s = avctx->priv_data; |
370 |
|
|
int i, total_gain, ret, error; |
371 |
|
|
|
372 |
|
410 |
s->block_len_bits = s->frame_len_bits; // required by non variable block len |
373 |
|
410 |
s->block_len = 1 << s->block_len_bits; |
374 |
|
|
|
375 |
|
410 |
ret = apply_window_and_mdct(avctx, frame); |
376 |
|
|
|
377 |
✗✓ |
410 |
if (ret < 0) |
378 |
|
|
return ret; |
379 |
|
|
|
380 |
✓✗ |
410 |
if (s->ms_stereo) { |
381 |
|
|
float a, b; |
382 |
|
|
int i; |
383 |
|
|
|
384 |
✓✓ |
840090 |
for (i = 0; i < s->block_len; i++) { |
385 |
|
839680 |
a = s->coefs[0][i] * 0.5; |
386 |
|
839680 |
b = s->coefs[1][i] * 0.5; |
387 |
|
839680 |
s->coefs[0][i] = a + b; |
388 |
|
839680 |
s->coefs[1][i] = a - b; |
389 |
|
|
} |
390 |
|
|
} |
391 |
|
|
|
392 |
✗✓ |
410 |
if ((ret = ff_alloc_packet2(avctx, avpkt, 2 * MAX_CODED_SUPERFRAME_SIZE, 0)) < 0) |
393 |
|
|
return ret; |
394 |
|
|
|
395 |
|
410 |
total_gain = 128; |
396 |
✓✓ |
3280 |
for (i = 64; i; i >>= 1) { |
397 |
|
2870 |
error = encode_frame(s, s->coefs, avpkt->data, avpkt->size, |
398 |
|
|
total_gain - i); |
399 |
✓✓ |
2870 |
if (error <= 0) |
400 |
|
1331 |
total_gain -= i; |
401 |
|
|
} |
402 |
|
|
|
403 |
✓✗✓✓
|
604 |
while(total_gain <= 128 && error > 0) |
404 |
|
194 |
error = encode_frame(s, s->coefs, avpkt->data, avpkt->size, total_gain++); |
405 |
✗✓ |
410 |
if (error > 0) { |
406 |
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid input data or requested bitrate too low, cannot encode\n"); |
407 |
|
|
avpkt->size = 0; |
408 |
|
|
return AVERROR(EINVAL); |
409 |
|
|
} |
410 |
✗✓ |
410 |
av_assert0((put_bits_count(&s->pb) & 7) == 0); |
411 |
|
410 |
i = avctx->block_align - put_bytes_count(&s->pb, 0); |
412 |
✗✓ |
410 |
av_assert0(i>=0); |
413 |
✓✓ |
22160 |
while(i--) |
414 |
|
21750 |
put_bits(&s->pb, 8, 'N'); |
415 |
|
|
|
416 |
|
410 |
flush_put_bits(&s->pb); |
417 |
✗✓ |
410 |
av_assert0(put_bits_ptr(&s->pb) - s->pb.buf == avctx->block_align); |
418 |
|
|
|
419 |
✓✗ |
410 |
if (frame->pts != AV_NOPTS_VALUE) |
420 |
|
410 |
avpkt->pts = frame->pts - ff_samples_to_time_base(avctx, avctx->initial_padding); |
421 |
|
|
|
422 |
|
410 |
avpkt->size = avctx->block_align; |
423 |
|
410 |
*got_packet_ptr = 1; |
424 |
|
410 |
return 0; |
425 |
|
|
} |
426 |
|
|
|
427 |
|
|
#if CONFIG_WMAV1_ENCODER |
428 |
|
|
AVCodec ff_wmav1_encoder = { |
429 |
|
|
.name = "wmav1", |
430 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"), |
431 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
432 |
|
|
.id = AV_CODEC_ID_WMAV1, |
433 |
|
|
.priv_data_size = sizeof(WMACodecContext), |
434 |
|
|
.init = encode_init, |
435 |
|
|
.encode2 = encode_superframe, |
436 |
|
|
.close = ff_wma_end, |
437 |
|
|
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
438 |
|
|
AV_SAMPLE_FMT_NONE }, |
439 |
|
|
}; |
440 |
|
|
#endif |
441 |
|
|
#if CONFIG_WMAV2_ENCODER |
442 |
|
|
AVCodec ff_wmav2_encoder = { |
443 |
|
|
.name = "wmav2", |
444 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"), |
445 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
446 |
|
|
.id = AV_CODEC_ID_WMAV2, |
447 |
|
|
.priv_data_size = sizeof(WMACodecContext), |
448 |
|
|
.init = encode_init, |
449 |
|
|
.encode2 = encode_superframe, |
450 |
|
|
.close = ff_wma_end, |
451 |
|
|
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
452 |
|
|
AV_SAMPLE_FMT_NONE }, |
453 |
|
|
}; |
454 |
|
|
#endif |