X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fnellymoserdec.c;h=1583c20c33f84bf33edb080e9b2dba23276002d6;hb=71ea26811cbd8345cb10ab29406594e1fc19204e;hp=2856479566b78111a89f5ab8b1b9041b6b149fc7;hpb=8b31c086b6065084644b86a63c9171f3094cf6ad;p=ffmpeg diff --git a/libavcodec/nellymoserdec.c b/libavcodec/nellymoserdec.c index 2856479566b..1583c20c33f 100644 --- a/libavcodec/nellymoserdec.c +++ b/libavcodec/nellymoserdec.c @@ -41,40 +41,25 @@ #include "fmtconvert.h" #include "sinewin.h" -#define ALT_BITSTREAM_READER_LE +#define BITSTREAM_READER_LE #include "get_bits.h" typedef struct NellyMoserDecodeContext { AVCodecContext* avctx; - DECLARE_ALIGNED(32, float, float_buf)[NELLY_SAMPLES]; - float state[128]; + AVFrame frame; + float *float_buf; AVLFG random_state; GetBitContext gb; float scale_bias; DSPContext dsp; FFTContext imdct_ctx; FmtConvertContext fmt_conv; - DECLARE_ALIGNED(32, float, imdct_out)[NELLY_BUF_LEN * 2]; + DECLARE_ALIGNED(32, float, imdct_buf)[2][NELLY_BUF_LEN]; + float *imdct_out; + float *imdct_prev; } NellyMoserDecodeContext; -static void overlap_and_window(NellyMoserDecodeContext *s, float *state, float *audio, float *a_in) -{ - int bot, top; - - bot = 0; - top = NELLY_BUF_LEN-1; - - while (bot < NELLY_BUF_LEN) { - audio[bot] = a_in [bot]*ff_sine_128[bot] - +state[bot]*ff_sine_128[top]; - - bot++; - top--; - } - memcpy(state, a_in + NELLY_BUF_LEN, sizeof(float)*NELLY_BUF_LEN); -} - static void nelly_decode_block(NellyMoserDecodeContext *s, const unsigned char block[NELLY_BLOCK_LEN], float audio[NELLY_SAMPLES]) @@ -122,10 +107,9 @@ static void nelly_decode_block(NellyMoserDecodeContext *s, memset(&aptr[NELLY_FILL_LEN], 0, (NELLY_BUF_LEN - NELLY_FILL_LEN) * sizeof(float)); - s->imdct_ctx.imdct_calc(&s->imdct_ctx, s->imdct_out, aptr); - /* XXX: overlapping and windowing should be part of a more - generic imdct function */ - overlap_and_window(s, s->state, aptr, s->imdct_out); + s->imdct_ctx.imdct_half(&s->imdct_ctx, s->imdct_out, aptr); + s->dsp.vector_fmul_window(aptr, s->imdct_prev + NELLY_BUF_LEN/2, s->imdct_out, ff_sine_128, NELLY_BUF_LEN/2); + FFSWAP(float *, s->imdct_out, s->imdct_prev); } } @@ -133,48 +117,57 @@ static av_cold int decode_init(AVCodecContext * avctx) { NellyMoserDecodeContext *s = avctx->priv_data; s->avctx = avctx; + s->imdct_out = s->imdct_buf[0]; + s->imdct_prev = s->imdct_buf[1]; av_lfg_init(&s->random_state, 0); ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0); - dsputil_init(&s->dsp, avctx); - ff_fmt_convert_init(&s->fmt_conv, avctx); - - s->scale_bias = 1.0/(1*8); + ff_dsputil_init(&s->dsp, avctx); + + if (avctx->request_sample_fmt == AV_SAMPLE_FMT_FLT) { + s->scale_bias = 1.0/(32768*8); + avctx->sample_fmt = AV_SAMPLE_FMT_FLT; + } else { + s->scale_bias = 1.0/(1*8); + avctx->sample_fmt = AV_SAMPLE_FMT_S16; + ff_fmt_convert_init(&s->fmt_conv, avctx); + s->float_buf = av_mallocz(NELLY_SAMPLES * sizeof(*s->float_buf)); + if (!s->float_buf) { + av_log(avctx, AV_LOG_ERROR, "error allocating float buffer\n"); + return AVERROR(ENOMEM); + } + } /* Generate overlap window */ if (!ff_sine_128[127]) ff_init_ff_sine_windows(7); - avctx->sample_fmt = AV_SAMPLE_FMT_S16; avctx->channel_layout = AV_CH_LAYOUT_MONO; + + avcodec_get_frame_defaults(&s->frame); + avctx->coded_frame = &s->frame; + return 0; } -static int decode_tag(AVCodecContext * avctx, - void *data, int *data_size, - AVPacket *avpkt) { +static int decode_tag(AVCodecContext *avctx, void *data, + int *got_frame_ptr, AVPacket *avpkt) +{ const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; NellyMoserDecodeContext *s = avctx->priv_data; - int blocks, i, block_size; - int16_t* samples; - samples = (int16_t*)data; - - if (buf_size < avctx->block_align) { - *data_size = 0; - return buf_size; - } + int blocks, i, ret; + int16_t *samples_s16; + float *samples_flt; - if (buf_size % 64) { - av_log(avctx, AV_LOG_ERROR, "Tag size %d.\n", buf_size); - *data_size = 0; - return buf_size; - } - block_size = NELLY_SAMPLES * av_get_bytes_per_sample(avctx->sample_fmt); - blocks = FFMIN(buf_size / 64, *data_size / block_size); + blocks = buf_size / NELLY_BLOCK_LEN; if (blocks <= 0) { - av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n"); - return AVERROR(EINVAL); + av_log(avctx, AV_LOG_ERROR, "Packet is too small\n"); + return AVERROR_INVALIDDATA; + } + if (buf_size % NELLY_BLOCK_LEN) { + av_log(avctx, AV_LOG_WARNING, "Leftover bytes: %d.\n", + buf_size % NELLY_BLOCK_LEN); } /* Normal numbers of blocks for sample rates: * 8000 Hz - 1 @@ -184,11 +177,29 @@ static int decode_tag(AVCodecContext * avctx, * 44100 Hz - 8 */ + /* get output buffer */ + s->frame.nb_samples = NELLY_SAMPLES * blocks; + if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return ret; + } + samples_s16 = (int16_t *)s->frame.data[0]; + samples_flt = (float *)s->frame.data[0]; + for (i=0 ; ifloat_buf); - s->fmt_conv.float_to_int16(&samples[i*NELLY_SAMPLES], s->float_buf, NELLY_SAMPLES); + if (avctx->sample_fmt == AV_SAMPLE_FMT_FLT) { + nelly_decode_block(s, buf, samples_flt); + samples_flt += NELLY_SAMPLES; + } else { + nelly_decode_block(s, buf, s->float_buf); + s->fmt_conv.float_to_int16(samples_s16, s->float_buf, NELLY_SAMPLES); + samples_s16 += NELLY_SAMPLES; + } + buf += NELLY_BLOCK_LEN; } - *data_size = blocks * block_size; + + *got_frame_ptr = 1; + *(AVFrame *)data = s->frame; return buf_size; } @@ -196,7 +207,9 @@ static int decode_tag(AVCodecContext * avctx, static av_cold int decode_end(AVCodecContext * avctx) { NellyMoserDecodeContext *s = avctx->priv_data; + av_freep(&s->float_buf); ff_mdct_end(&s->imdct_ctx); + return 0; } @@ -208,6 +221,9 @@ AVCodec ff_nellymoser_decoder = { .init = decode_init, .close = decode_end, .decode = decode_tag, + .capabilities = CODEC_CAP_DR1 | CODEC_CAP_PARAM_CHANGE, .long_name = NULL_IF_CONFIG_SMALL("Nellymoser Asao"), + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT, + AV_SAMPLE_FMT_S16, + AV_SAMPLE_FMT_NONE }, }; -