On 4/28/16, Paul B Mahol <one...@gmail.com> wrote:
> Hi,
>
> patches attached.
>
Improved version attached.
From 1a330f7bba56bc1f7ed8f972c130f2a3997fd5b8 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <one...@gmail.com>
Date: Mon, 25 Apr 2016 20:42:58 +0200
Subject: [PATCH 1/2] avcodec: add Bonk decoder
Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/bonk.c | 423 ++++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/codec_desc.c | 7 +
5 files changed, 433 insertions(+)
create mode 100644 libavcodec/bonk.c
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 8f63261..34006cf 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -211,6 +211,7 @@ OBJS-$(CONFIG_BMP_DECODER) += bmp.o msrledec.o
OBJS-$(CONFIG_BMP_ENCODER) += bmpenc.o
OBJS-$(CONFIG_BMV_AUDIO_DECODER) += bmvaudio.o
OBJS-$(CONFIG_BMV_VIDEO_DECODER) += bmvvideo.o
+OBJS-$(CONFIG_BONK_DECODER) += bonk.o
OBJS-$(CONFIG_BRENDER_PIX_DECODER) += brenderpix.o
OBJS-$(CONFIG_C93_DECODER) += c93.o
OBJS-$(CONFIG_CAVS_DECODER) += cavs.o cavsdec.o cavsdsp.o \
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 2b46a13..c5caf7e 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -386,6 +386,7 @@ void avcodec_register_all(void)
REGISTER_DECODER(BINKAUDIO_DCT, binkaudio_dct);
REGISTER_DECODER(BINKAUDIO_RDFT, binkaudio_rdft);
REGISTER_DECODER(BMV_AUDIO, bmv_audio);
+ REGISTER_DECODER(BONK, bonk);
REGISTER_DECODER(COOK, cook);
REGISTER_ENCDEC (DCA, dca);
REGISTER_DECODER(DSD_LSBF, dsd_lsbf);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 161ee9d..f5da6e5 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -590,6 +590,7 @@ enum AVCodecID {
AV_CODEC_ID_INTERPLAY_ACM,
AV_CODEC_ID_XMA1,
AV_CODEC_ID_XMA2,
+ AV_CODEC_ID_BONK,
/* subtitle codecs */
AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
diff --git a/libavcodec/bonk.c b/libavcodec/bonk.c
new file mode 100644
index 0000000..10ec513
--- /dev/null
+++ b/libavcodec/bonk.c
@@ -0,0 +1,423 @@
+/*
+ * Bonk audio decoder
+ * Copyright (c) 2016 Paul B Mahol
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/avassert.h"
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#define BITSTREAM_READER_LE
+#include "get_bits.h"
+#include "bytestream.h"
+#include "internal.h"
+
+typedef struct BitCount {
+ uint8_t bit;
+ unsigned count;
+} BitCount;
+
+typedef struct BonkContext {
+ GetBitContext gb;
+ int skip;
+
+ uint8_t *bitstream;
+ int max_framesize;
+ int bitstream_size;
+ int bitstream_index;
+
+ uint64_t nb_samples;
+ int lossless;
+ int mid_side;
+ int n_taps;
+ int down_sampling;
+ int samples_per_packet;
+
+ int state[2][2048], k[2048];
+ int *samples;
+ int *input_samples;
+ uint8_t quant[2048];
+ BitCount *bits;
+} BonkContext;
+
+static av_cold int bonk_close(AVCodecContext *avctx)
+{
+ BonkContext *s = avctx->priv_data;
+
+ av_freep(&s->bitstream);
+ av_freep(&s->input_samples);
+ av_freep(&s->samples);
+ av_freep(&s->bits);
+ s->bitstream_size = 0;
+
+ return 0;
+}
+
+static av_cold int bonk_init(AVCodecContext *avctx)
+{
+ BonkContext *s = avctx->priv_data;
+ int i;
+
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ if (avctx->extradata_size < 17)
+ return AVERROR(EINVAL);
+
+ if (avctx->channels < 1 || avctx->channels > 2)
+ return AVERROR_INVALIDDATA;
+
+ s->nb_samples = AV_RL32(avctx->extradata + 1) / avctx->channels;
+ if (!s->nb_samples)
+ s->nb_samples = UINT64_MAX;
+ s->lossless = avctx->extradata[10] != 0;
+ s->mid_side = avctx->extradata[11] != 0;
+ s->n_taps = AV_RL16(avctx->extradata + 12);
+ if (!s->n_taps || s->n_taps > 2048)
+ return AVERROR(EINVAL);
+
+ s->down_sampling = avctx->extradata[14];
+ if (!s->down_sampling)
+ return AVERROR(EINVAL);
+
+ s->samples_per_packet = AV_RL16(avctx->extradata + 15);
+ if (!s->samples_per_packet)
+ return AVERROR(EINVAL);
+ s->max_framesize = s->samples_per_packet * avctx->channels * s->down_sampling * 8;
+ s->bitstream = av_calloc(s->max_framesize + AV_INPUT_BUFFER_PADDING_SIZE, sizeof(*s->bitstream));
+ if (!s->bitstream)
+ return AVERROR(ENOMEM);
+
+ s->input_samples = av_calloc(s->samples_per_packet, sizeof(*s->input_samples));
+ if (!s->input_samples)
+ return AVERROR(ENOMEM);
+
+ s->samples = av_calloc(s->samples_per_packet * s->down_sampling * avctx->channels, sizeof(*s->samples));
+ if (!s->samples)
+ return AVERROR(ENOMEM);
+
+ s->bits = av_malloc_array(s->max_framesize * 8, sizeof(*s->bits));
+ if (!s->bits)
+ return AVERROR(ENOMEM);
+
+ for (i = 0; i < FF_ARRAY_ELEMS(s->quant); i++)
+ s->quant[i] = sqrt(i + 1);
+
+ return 0;
+}
+
+static int bits_to_store(uint32_t x)
+{
+ int res = 0;
+
+ while (x) {
+ res++;
+ x >>= 1;
+ }
+
+ return res;
+}
+
+static unsigned read_uint_max(BonkContext *s, int max)
+{
+ unsigned value = 0;
+ int i, bits;
+
+ if (max == 0)
+ return 0;
+
+ bits = bits_to_store(max);
+
+ for (i = 0; i < bits - 1; i++)
+ if (get_bits1(&s->gb))
+ value += 1 << i;
+
+ if ((value | (1 << (bits - 1))) <= max)
+ if (get_bits1(&s->gb))
+ value += 1 << (bits - 1);
+
+ return value;
+}
+
+static int intlist_read(BonkContext *s, int *buf, int entries, int base_2_part)
+{
+ int i, low_bits = 0, x = 0, max_x;
+ int n_zeros = 0, step = 256, dominant = 0;
+ int pos = 0, level = 0;
+ BitCount *bits = s->bits;
+
+ if (base_2_part) {
+ low_bits = get_bits(&s->gb, 4);
+
+ if (low_bits) {
+ for (i = 0; i < entries; i++)
+ buf[i] = get_bits(&s->gb, low_bits);
+ } else {
+ memset(buf, 0, entries * sizeof(*buf));
+ }
+ } else {
+ memset(buf, 0, entries * sizeof(*buf));
+ }
+
+ while (n_zeros < entries) {
+ int steplet = step >> 8;
+
+ if (get_bits_left(&s->gb) <= 0)
+ return AVERROR_INVALIDDATA;
+
+ if (!get_bits1(&s->gb)) {
+ if (steplet > 0) {
+ bits[x ].bit = dominant;
+ bits[x++].count = steplet;
+ }
+
+ if (!dominant)
+ n_zeros += steplet;
+
+ step += step / 8;
+ } else {
+ int actual_run = read_uint_max(s, steplet - 1);
+
+ if (actual_run > 0) {
+ bits[x ].bit = dominant;
+ bits[x++].count = actual_run;
+ }
+
+ bits[x ].bit = !dominant;
+ bits[x++].count = 1;
+
+ if (!dominant)
+ n_zeros += actual_run;
+ else
+ n_zeros++;
+
+ step -= step / 8;
+ }
+
+ if (step < 256) {
+ if (step == 0)
+ return AVERROR_INVALIDDATA;
+ step = 65536 / step;
+ dominant = !dominant;
+ }
+ }
+
+ max_x = x;
+ x = 0;
+ n_zeros = 0;
+ for (i = 0; n_zeros < entries; i++) {
+ while (1) {
+ if (pos >= entries) {
+ pos = 0;
+ level += 1 << low_bits;
+ }
+
+ if (buf[pos] >= level)
+ break;
+
+ pos++;
+ }
+
+ if (x >= max_x)
+ return AVERROR_INVALIDDATA;
+ if (bits[x].bit)
+ buf[pos] += 1 << low_bits;
+ else
+ n_zeros++;
+
+ bits[x].count--;
+ if (bits[x].count == 0)
+ x++;
+
+ pos++;
+ }
+
+ for (i = 0; i < entries; i++) {
+ if (buf[i] && get_bits1(&s->gb)) {
+ buf[i] = -buf[i];
+ }
+ }
+
+ return 0;
+}
+
+static inline int shift_down(int a, int b)
+{
+ return (a >> b) + (a < 0);
+}
+
+static inline int shift(int a, int b)
+{
+ return a + (1 << b - 1) >> b;
+}
+
+#define LATTICE_SHIFT 10
+#define SAMPLE_SHIFT 4
+#define SAMPLE_FACTOR (1 << SAMPLE_SHIFT)
+
+static int predictor_calc_error(int *k, int *state, int order, int error)
+{
+ int i, x = error - shift_down(k[order-1] * state[order-1], LATTICE_SHIFT);
+ int *k_ptr = &(k[order-2]),
+ *state_ptr = &(state[order-2]);
+
+ for (i = order-2; i >= 0; i--, k_ptr--, state_ptr--) {
+ int k_value = *k_ptr, state_value = *state_ptr;
+
+ x -= shift_down(k_value * state_value, LATTICE_SHIFT);
+ state_ptr[1] = state_value + shift_down(k_value * x, LATTICE_SHIFT);
+ }
+
+ // don't drift too far, to avoid overflows
+ av_clip(x, -(SAMPLE_FACTOR << 16), SAMPLE_FACTOR << 16);
+
+ state[0] = x;
+
+ return x;
+}
+
+static void predictor_init_state(int *k, int *state, int order)
+{
+ int i;
+
+ for (i = order - 2; i >= 0; i--) {
+ int j, p, x = state[i];
+
+ for (j = 0, p = i + 1; p < order; j++,p++) {
+ int tmp = x + shift_down(k[j] * state[p], LATTICE_SHIFT);
+ state[p] += shift_down(k[j] * x, LATTICE_SHIFT);
+ x = tmp;
+ }
+ }
+}
+
+static int bonk_decode(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *pkt)
+{
+ BonkContext *s = avctx->priv_data;
+ GetBitContext *gb = &s->gb;
+ AVFrame *frame = data;
+ const uint8_t *buf;
+ int16_t *samples;
+ int i, j, ch, quant, ret, n, buf_size, input_buf_size;
+
+ if ((!pkt->size && !s->bitstream_size) || s->nb_samples == 0) {
+ *got_frame_ptr = 0;
+ return pkt->size;
+ }
+
+ buf_size = FFMIN(pkt->size, s->max_framesize - s->bitstream_size);
+ input_buf_size = buf_size;
+ if (s->bitstream_index + s->bitstream_size + buf_size + AV_INPUT_BUFFER_PADDING_SIZE > s->max_framesize) {
+ memmove(s->bitstream, &s->bitstream[s->bitstream_index], s->bitstream_size);
+ s->bitstream_index = 0;
+ }
+ if (pkt->data)
+ memcpy(&s->bitstream[s->bitstream_index + s->bitstream_size], pkt->data, buf_size);
+ buf = &s->bitstream[s->bitstream_index];
+ buf_size += s->bitstream_size;
+ s->bitstream_size = buf_size;
+ if (buf_size < s->max_framesize && pkt->data) {
+ *got_frame_ptr = 0;
+ return input_buf_size;
+ }
+
+ frame->nb_samples = FFMIN(s->samples_per_packet * s->down_sampling, s->nb_samples);
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+ return ret;
+ samples = (uint16_t *)frame->data[0];
+
+ init_get_bits8(gb, buf, buf_size);
+ skip_bits(gb, s->skip);
+
+ if ((ret = intlist_read(s, s->k, s->n_taps, 0)) < 0)
+ return ret;
+
+ for (i = 0; i < s->n_taps; i++) {
+ s->k[i] *= s->quant[i];
+ }
+ quant = s->lossless ? 1 : get_bits(&s->gb, 16) * SAMPLE_FACTOR;
+
+ for (ch = 0; ch < avctx->channels; ch++) {
+ int *sample = s->samples + ch;
+
+ predictor_init_state(s->k, s->state[ch], s->n_taps);
+ if ((ret = intlist_read(s, s->input_samples, s->samples_per_packet, 1)) < 0)
+ return ret;
+
+ for (i = 0; i < s->samples_per_packet; i++) {
+ for (j = 0; j < s->down_sampling - 1; j++) {
+ *sample = predictor_calc_error(s->k, s->state[ch], s->n_taps, 0);
+ sample += avctx->channels;
+ }
+
+ *sample = predictor_calc_error(s->k, s->state[ch], s->n_taps, s->input_samples[i] * quant);
+ sample += avctx->channels;
+ }
+
+ for (i = 0; i < s->n_taps; i++)
+ s->state[ch][i] = s->samples[s->samples_per_packet * s->down_sampling * avctx->channels -
+ avctx->channels + ch - i * avctx->channels];
+ }
+
+ if (s->mid_side && avctx->channels == 2) {
+ for (i = 0; i < frame->nb_samples * 2; i += 2) {
+ s->samples[i + 1] += shift(s->samples[i], 1);
+ s->samples[i] -= s->samples[i + 1];
+ }
+ }
+
+ if (!s->lossless) {
+ for (i = 0; i < frame->nb_samples * avctx->channels; i++)
+ s->samples[i] = shift(s->samples[i], 4);
+ }
+
+ for (i = 0; i < frame->nb_samples * avctx->channels; i++) {
+ samples[i] = av_clip_int16(s->samples[i]);
+ }
+
+ *got_frame_ptr = 1;
+
+ s->nb_samples -= frame->nb_samples;
+
+ s->skip = get_bits_count(gb) - 8 * (get_bits_count(gb) / 8);
+ n = get_bits_count(gb) / 8;
+
+ if (n > buf_size) {
+ s->bitstream_size = 0;
+ s->bitstream_index = 0;
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (s->bitstream_size) {
+ s->bitstream_index += n;
+ s->bitstream_size -= n;
+ return input_buf_size;
+ }
+ return n;
+}
+
+AVCodec ff_bonk_decoder = {
+ .name = "bonk",
+ .long_name = NULL_IF_CONFIG_SMALL("Bonk"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_BONK,
+ .init = bonk_init,
+ .decode = bonk_decode,
+ .close = bonk_close,
+ .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
+ .priv_data_size = sizeof(BonkContext),
+};
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index 7b48ee6..b338edb 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -2676,6 +2676,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("Xbox Media Audio 2"),
.props = AV_CODEC_PROP_LOSSY,
},
+ {
+ .id = AV_CODEC_ID_BONK,
+ .type = AVMEDIA_TYPE_AUDIO,
+ .name = "bonk",
+ .long_name = NULL_IF_CONFIG_SMALL("Bonk"),
+ .props = AV_CODEC_PROP_LOSSY | AV_CODEC_PROP_LOSSLESS,
+ },
/* subtitle codecs */
{
--
2.5.0
From a04aedda6ee54636827ffb5dbf2eddf0178bbec1 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <one...@gmail.com>
Date: Mon, 25 Apr 2016 20:39:54 +0200
Subject: [PATCH 2/2] avformat: add Bonk demuxer
Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/bonk.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 83 insertions(+)
create mode 100644 libavformat/bonk.c
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 51260f4..8d44568 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -116,6 +116,7 @@ OBJS-$(CONFIG_BIT_DEMUXER) += bit.o
OBJS-$(CONFIG_BIT_MUXER) += bit.o
OBJS-$(CONFIG_BMV_DEMUXER) += bmv.o
OBJS-$(CONFIG_BOA_DEMUXER) += boadec.o
+OBJS-$(CONFIG_BONK_DEMUXER) += bonk.o rawdec.o
OBJS-$(CONFIG_BFSTM_DEMUXER) += brstm.o
OBJS-$(CONFIG_BRSTM_DEMUXER) += brstm.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o voc_packet.o vocdec.o voc.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index dbf2737..e4e7761 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -93,6 +93,7 @@ void av_register_all(void)
REGISTER_DEMUXER (BFSTM, bfstm);
REGISTER_DEMUXER (BRSTM, brstm);
REGISTER_DEMUXER (BOA, boa);
+ REGISTER_DEMUXER (BONK, bonk);
REGISTER_DEMUXER (C93, c93);
REGISTER_MUXDEMUX(CAF, caf);
REGISTER_MUXDEMUX(CAVSVIDEO, cavsvideo);
diff --git a/libavformat/bonk.c b/libavformat/bonk.c
new file mode 100644
index 0000000..24316a5
--- /dev/null
+++ b/libavformat/bonk.c
@@ -0,0 +1,81 @@
+/*
+ * Bonk demuxer
+ * Copyright (c) 2016 Paul B Mahol
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "internal.h"
+#include "rawdec.h"
+
+static int bonk_probe(AVProbeData *p)
+{
+ int i;
+
+ for (i = 0; i < p->buf_size - 5; i++) {
+ if (!p->buf[i] && AV_RL32(p->buf + i + 1) == MKTAG('B','O','N','K'))
+ return AVPROBE_SCORE_MAX;
+ else if (!p->buf[i])
+ break;
+ }
+
+ return 0;
+}
+
+static int bonk_read_header(AVFormatContext *s)
+{
+ AVStream *st;
+ int ret, i;
+
+ for (i = 0; !avio_feof(s->pb); i++) {
+ int b = avio_r8(s->pb);
+ if (!b && avio_rl32(s->pb) == MKTAG('B','O','N','K'))
+ break;
+ else if (!b)
+ return AVERROR_INVALIDDATA;
+ }
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ if ((ret = ff_get_extradata(s, st->codecpar, s->pb, 17)) < 0)
+ return ret;
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_id = AV_CODEC_ID_BONK;
+ st->codecpar->sample_rate = AV_RL32(st->codecpar->extradata + 5);
+ st->codecpar->channels = st->codecpar->extradata[9];
+ if (st->codecpar->channels == 0)
+ return AVERROR_INVALIDDATA;
+ st->duration = AV_RL32(st->codecpar->extradata + 1) / st->codecpar->channels;
+ st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
+ avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
+
+ return 0;
+}
+
+AVInputFormat ff_bonk_demuxer = {
+ .name = "bonk",
+ .long_name = NULL_IF_CONFIG_SMALL("Bonk"),
+ .read_probe = bonk_probe,
+ .read_header = bonk_read_header,
+ .read_packet = ff_raw_read_partial_packet,
+ .extensions = "bonk",
+ .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS,
+ .raw_codec_id = AV_CODEC_ID_BONK,
+};
--
2.5.0
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
