avcodec: add PDV decoder
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parent
0760528af2
commit
40bae5be5e
@ -3,6 +3,7 @@ releases are sorted from youngest to oldest.
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version <next>:
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- libaribcaption decoder
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- Playdate video decoder
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version 6.0:
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- Radiance HDR image support
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1
configure
vendored
1
configure
vendored
@ -2899,6 +2899,7 @@ notchlc_decoder_select="lzf"
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nuv_decoder_select="idctdsp"
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opus_decoder_deps="swresample"
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opus_encoder_select="audio_frame_queue"
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pdv_decoder_deps="zlib"
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png_decoder_select="inflate_wrapper"
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png_encoder_select="deflate_wrapper llvidencdsp"
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prores_decoder_select="blockdsp idctdsp"
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@ -583,6 +583,7 @@ OBJS-$(CONFIG_PBM_DECODER) += pnmdec.o pnm.o
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OBJS-$(CONFIG_PBM_ENCODER) += pnmenc.o
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OBJS-$(CONFIG_PCX_DECODER) += pcx.o
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OBJS-$(CONFIG_PCX_ENCODER) += pcxenc.o
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OBJS-$(CONFIG_PDV_DECODER) += pdvdec.o
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OBJS-$(CONFIG_PFM_DECODER) += pnmdec.o pnm.o
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OBJS-$(CONFIG_PFM_ENCODER) += pnmenc.o
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OBJS-$(CONFIG_PGM_DECODER) += pnmdec.o pnm.o
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@ -251,6 +251,7 @@ extern const FFCodec ff_pbm_encoder;
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extern const FFCodec ff_pbm_decoder;
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extern const FFCodec ff_pcx_encoder;
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extern const FFCodec ff_pcx_decoder;
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extern const FFCodec ff_pdv_decoder;
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extern const FFCodec ff_pfm_encoder;
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extern const FFCodec ff_pfm_decoder;
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extern const FFCodec ff_pgm_encoder;
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@ -1923,6 +1923,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
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.long_name = NULL_IF_CONFIG_SMALL("ViewQuest VQC"),
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.props = AV_CODEC_PROP_LOSSY,
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},
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{
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.id = AV_CODEC_ID_PDV,
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.type = AVMEDIA_TYPE_VIDEO,
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.name = "pdv",
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.long_name = NULL_IF_CONFIG_SMALL("PDV (PlayDate Video)"),
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.props = AV_CODEC_PROP_LOSSY,
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},
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/* various PCM "codecs" */
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{
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@ -320,6 +320,7 @@ enum AVCodecID {
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AV_CODEC_ID_WBMP,
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AV_CODEC_ID_MEDIA100,
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AV_CODEC_ID_VQC,
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AV_CODEC_ID_PDV,
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/* various PCM "codecs" */
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AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
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127
libavcodec/pdvdec.c
Normal file
127
libavcodec/pdvdec.c
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@ -0,0 +1,127 @@
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/*
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* PDV video format
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*
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* Copyright (c) 2023 Paul B Mahol
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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 "avcodec.h"
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#include "codec_internal.h"
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#include "decode.h"
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#include "zlib_wrapper.h"
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#include <zlib.h>
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typedef struct PDVContext {
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AVFrame *previous_frame;
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FFZStream zstream;
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} PDVContext;
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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PDVContext *s = avctx->priv_data;
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avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
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s->previous_frame = av_frame_alloc();
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if (!s->previous_frame)
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return AVERROR(ENOMEM);
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return ff_inflate_init(&s->zstream, avctx);
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}
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static av_cold int decode_end(AVCodecContext *avctx)
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{
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PDVContext *s = avctx->priv_data;
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av_frame_free(&s->previous_frame);
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ff_inflate_end(&s->zstream);
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
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int *got_frame, AVPacket *avpkt)
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{
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PDVContext *s = avctx->priv_data;
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AVFrame *prev_frame = s->previous_frame;
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z_stream *const zstream = &s->zstream.zstream;
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uint8_t *dst, *prev = prev_frame->data[0];
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int ret, zret;
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zret = inflateReset(zstream);
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if (zret != Z_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not reset inflate: %d.\n", zret);
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return AVERROR_INVALIDDATA;
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}
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if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
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return ret;
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zstream->next_in = avpkt->data;
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zstream->avail_in = avpkt->size;
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dst = frame->data[0];
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for (int i = 0; i < avctx->height; i++) {
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zstream->next_out = dst;
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zstream->avail_out = (avctx->width + 7) >> 3;
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zret = inflate(zstream, Z_SYNC_FLUSH);
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if (zret != Z_OK && zret != Z_STREAM_END) {
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av_log(avctx, AV_LOG_ERROR,
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"Inflate failed with return code: %d.\n", zret);
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return AVERROR_INVALIDDATA;
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}
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if (!(avpkt->flags & AV_PKT_FLAG_KEY)) {
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for (int j = 0; j < (avctx->width + 7) >> 3; j++)
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dst[j] ^= prev[j];
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prev += prev_frame->linesize[0];
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}
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dst += frame->linesize[0];
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}
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av_frame_unref(s->previous_frame);
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if ((ret = av_frame_ref(s->previous_frame, frame)) < 0)
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return ret;
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if (avpkt->flags & AV_PKT_FLAG_KEY) {
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frame->key_frame = 1;
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frame->pict_type = AV_PICTURE_TYPE_I;
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} else {
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frame->pict_type = AV_PICTURE_TYPE_P;
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}
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*got_frame = 1;
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return avpkt->size;
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}
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const FFCodec ff_pdv_decoder = {
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.p.name = "pdv",
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CODEC_LONG_NAME("PDV (PlayDate Video)"),
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.priv_data_size = sizeof(PDVContext),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_PDV,
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.p.capabilities = AV_CODEC_CAP_DR1,
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.caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
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.init = decode_init,
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.close = decode_end,
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FF_CODEC_DECODE_CB(decode_frame),
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};
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@ -29,7 +29,7 @@
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#include "version_major.h"
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#define LIBAVCODEC_VERSION_MINOR 9
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#define LIBAVCODEC_VERSION_MINOR 10
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#define LIBAVCODEC_VERSION_MICRO 100
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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