X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmace.c;h=25c6b703ac19431600c0172dc1866019f0b9ca26;hb=295e05a762332c5edcc84c325e94457815a51b5c;hp=423575374ca5b28e957356d097b08d9a8d482977;hpb=b0e047de15ffd3e8ff7b6450b3a6cc6da72486c0;p=ffmpeg diff --git a/libavcodec/mace.c b/libavcodec/mace.c index 423575374ca..25c6b703ac1 100644 --- a/libavcodec/mace.c +++ b/libavcodec/mace.c @@ -2,32 +2,34 @@ * MACE decoder * Copyright (c) 2002 Laszlo Torok * - * 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 */ /** - * @file mace.c + * @file * MACE decoder. */ #include "avcodec.h" +#include "internal.h" +#include "libavutil/common.h" /* - * Adapted to ffmpeg by Francois Revol + * Adapted to libavcodec by Francois Revol * (removed 68k REG stuff, changed types, added some statics and consts, * libavcodec api, context stuff, interlaced stereo out). */ @@ -185,9 +187,7 @@ static int16_t read_table(ChannelData *chd, uint8_t val, int tab_idx) return current; } -static void chomp3(ChannelData *chd, int16_t *output, uint8_t val, - int tab_idx, - uint32_t numChannels) +static void chomp3(ChannelData *chd, int16_t *output, uint8_t val, int tab_idx) { int16_t current = read_table(chd, val, tab_idx); @@ -198,9 +198,7 @@ static void chomp3(ChannelData *chd, int16_t *output, uint8_t val, *output = QT_8S_2_16S(current); } -static void chomp6(ChannelData *chd, int16_t *output, uint8_t val, - int tab_idx, - uint32_t numChannels) +static void chomp6(ChannelData *chd, int16_t *output, uint8_t val, int tab_idx) { int16_t current = read_table(chd, val, tab_idx); @@ -220,106 +218,89 @@ static void chomp6(ChannelData *chd, int16_t *output, uint8_t val, output[0] = QT_8S_2_16S(chd->previous + chd->prev2 - ((chd->prev2-current) >> 2)); - output[numChannels] = QT_8S_2_16S(chd->previous + current + - ((chd->prev2-current) >> 2)); + output[1] = QT_8S_2_16S(chd->previous + current + + ((chd->prev2-current) >> 2)); chd->prev2 = chd->previous; chd->previous = current; } static av_cold int mace_decode_init(AVCodecContext * avctx) { - if (avctx->channels > 2) - return -1; - avctx->sample_fmt = SAMPLE_FMT_S16; + if (avctx->channels > 2 || avctx->channels < 1) + return AVERROR(EINVAL); + avctx->sample_fmt = AV_SAMPLE_FMT_S16P; + return 0; } -static int mace3_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - const uint8_t *buf, int buf_size) +static int mace_decode_frame(AVCodecContext *avctx, void *data, + int *got_frame_ptr, AVPacket *avpkt) { - int16_t *samples = data; + AVFrame *frame = data; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + int16_t **samples; MACEContext *ctx = avctx->priv_data; - int i, j, k, l; - - if (*data_size < 2 * 3 * buf_size) { - av_log(avctx, AV_LOG_ERROR, "Output buffer too small!\n"); - return -1; + int i, j, k, l, ret; + int is_mace3 = (avctx->codec_id == AV_CODEC_ID_MACE3); + + /* get output buffer */ + frame->nb_samples = 3 * (buf_size << (1 - is_mace3)) / avctx->channels; + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return ret; } + samples = (int16_t **)frame->extended_data; for(i = 0; i < avctx->channels; i++) { - int16_t *output = samples + i; + int16_t *output = samples[i]; - for (j=0; j < buf_size / 2 / avctx->channels; j++) - for (k=0; k < 2; k++) { - uint8_t pkt = buf[i*2 + j*2*avctx->channels + k]; - uint8_t val[3] = {pkt & 7, (pkt >> 3) & 3, pkt >> 5}; + for (j=0; j < buf_size / (avctx->channels << is_mace3); j++) + for (k=0; k < (1 << is_mace3); k++) { + uint8_t pkt = buf[(i << is_mace3) + + (j*avctx->channels << is_mace3) + k]; - for (l=0; l < 3; l++) { - chomp3(&ctx->chd[i], output, val[l], l, avctx->channels); - output += avctx->channels; - } - } - } - - *data_size = 2 * 3 * buf_size; - - return buf_size; -} + uint8_t val[2][3] = {{pkt >> 5, (pkt >> 3) & 3, pkt & 7 }, + {pkt & 7 , (pkt >> 3) & 3, pkt >> 5}}; -static int mace6_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - const uint8_t *buf, int buf_size) -{ - int16_t *samples = data; - MACEContext *ctx = avctx->priv_data; - int i, j, l; - - if (*data_size < 2 * 6 * buf_size) { - av_log(avctx, AV_LOG_ERROR, "Output buffer too small!\n"); - return -1; - } - - for(i = 0; i < avctx->channels; i++) { - int16_t *output = samples + i; - - for (j = 0; j < buf_size / avctx->channels; j++) { - uint8_t pkt = buf[i + j*avctx->channels]; - uint8_t val[3] = {pkt >> 5, (pkt >> 3) & 3, pkt & 7}; + for (l=0; l < 3; l++) { + if (is_mace3) + chomp3(&ctx->chd[i], output, val[1][l], l); + else + chomp6(&ctx->chd[i], output, val[0][l], l); - for (l=0; l < 3; l++) { - chomp6(&ctx->chd[i], output, val[l], l, avctx->channels); - output += avctx->channels << 1; + output += 1 << (1-is_mace3); + } } - } } - *data_size = 2 * 6 * buf_size; + *got_frame_ptr = 1; return buf_size; } -AVCodec mace3_decoder = { - "mace3", - CODEC_TYPE_AUDIO, - CODEC_ID_MACE3, - sizeof(MACEContext), - mace_decode_init, - NULL, - NULL, - mace3_decode_frame, - .long_name = NULL_IF_CONFIG_SMALL("MACE (Macintosh Audio Compression/Expansion) 3:1"), +AVCodec ff_mace3_decoder = { + .name = "mace3", + .long_name = NULL_IF_CONFIG_SMALL("MACE (Macintosh Audio Compression/Expansion) 3:1"), + .type = AVMEDIA_TYPE_AUDIO, + .id = AV_CODEC_ID_MACE3, + .priv_data_size = sizeof(MACEContext), + .init = mace_decode_init, + .decode = mace_decode_frame, + .capabilities = CODEC_CAP_DR1, + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, + AV_SAMPLE_FMT_NONE }, }; -AVCodec mace6_decoder = { - "mace6", - CODEC_TYPE_AUDIO, - CODEC_ID_MACE6, - sizeof(MACEContext), - mace_decode_init, - NULL, - NULL, - mace6_decode_frame, - .long_name = NULL_IF_CONFIG_SMALL("MACE (Macintosh Audio Compression/Expansion) 6:1"), +AVCodec ff_mace6_decoder = { + .name = "mace6", + .long_name = NULL_IF_CONFIG_SMALL("MACE (Macintosh Audio Compression/Expansion) 6:1"), + .type = AVMEDIA_TYPE_AUDIO, + .id = AV_CODEC_ID_MACE6, + .priv_data_size = sizeof(MACEContext), + .init = mace_decode_init, + .decode = mace_decode_frame, + .capabilities = CODEC_CAP_DR1, + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, + AV_SAMPLE_FMT_NONE }, }; -