X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fpngenc.c;h=947c7e147b9a63bd4b4bb41efc18aae9398a1f7e;hb=b5d2bf964be338bf8e86a01619646332729b434e;hp=703371d856190475efbebb8b7ed904a50d517ccd;hpb=00829b9bc103646a79614e15d15e0d2a0e0c6868;p=ffmpeg diff --git a/libavcodec/pngenc.c b/libavcodec/pngenc.c index 703371d8561..947c7e147b9 100644 --- a/libavcodec/pngenc.c +++ b/libavcodec/pngenc.c @@ -1,27 +1,27 @@ /* * PNG image format - * Copyright (c) 2003 Fabrice Bellard. + * Copyright (c) 2003 Fabrice Bellard * - * 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 */ #include "avcodec.h" #include "bytestream.h" +#include "dsputil.h" #include "png.h" -#include /* TODO: * - add 2, 4 and 16 bit depth support @@ -199,7 +199,7 @@ static void png_write_chunk(uint8_t **f, uint32_t tag, crc = crc32(0, Z_NULL, 0); AV_WL32(tagbuf, tag); crc = crc32(crc, tagbuf, 4); - bytestream_put_be32(f, bswap_32(tag)); + bytestream_put_be32(f, av_bswap32(tag)); if (length > 0) { crc = crc32(crc, buf, length); memcpy(*f, buf, length); @@ -229,12 +229,13 @@ static int png_write_row(PNGEncContext *s, const uint8_t *data, int size) return 0; } -static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ +static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, + const AVFrame *pict, int *got_packet) +{ PNGEncContext *s = avctx->priv_data; - AVFrame *pict = data; - AVFrame * const p= (AVFrame*)&s->picture; + AVFrame * const p= &s->picture; int bit_depth, color_type, y, len, row_size, ret, is_progressive; - int bits_per_pixel, pass_row_size; + int bits_per_pixel, pass_row_size, enc_row_size, max_packet_size; int compression_level; uint8_t *ptr, *top; uint8_t *crow_base = NULL, *crow_buf, *crow; @@ -243,13 +244,9 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, uint8_t *top_buf = NULL; *p = *pict; - p->pict_type= FF_I_TYPE; + p->pict_type= AV_PICTURE_TYPE_I; p->key_frame= 1; - s->bytestream_start= - s->bytestream= buf; - s->bytestream_end= buf+buf_size; - is_progressive = !!(avctx->flags & CODEC_FLAG_INTERLACED_DCT); switch(avctx->pix_fmt) { case PIX_FMT_RGB32: @@ -288,6 +285,22 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, Z_DEFLATED, 15, 8, Z_DEFAULT_STRATEGY); if (ret != Z_OK) return -1; + + enc_row_size = deflateBound(&s->zstream, row_size); + max_packet_size = avctx->height * (enc_row_size + + ((enc_row_size + IOBUF_SIZE - 1) / IOBUF_SIZE) * 12) + + FF_MIN_BUFFER_SIZE; + if (!pkt->data && + (ret = av_new_packet(pkt, max_packet_size)) < 0) { + av_log(avctx, AV_LOG_ERROR, "Could not allocate output packet of size %d.\n", + max_packet_size); + return ret; + } + + s->bytestream_start = + s->bytestream = pkt->data; + s->bytestream_end = pkt->data + pkt->size; + crow_base = av_malloc((row_size + 32) << (s->filter_type == PNG_FILTER_VALUE_MIXED)); if (!crow_base) goto fail; @@ -409,7 +422,11 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, } png_write_chunk(&s->bytestream, MKTAG('I', 'E', 'N', 'D'), NULL, 0); - ret = s->bytestream - s->bytestream_start; + pkt->size = s->bytestream - s->bytestream_start; + pkt->flags |= AV_PKT_FLAG_KEY; + *got_packet = 1; + ret = 0; + the_end: av_free(crow_base); av_free(progressive_buf); @@ -422,12 +439,12 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, goto the_end; } -static int png_enc_init(AVCodecContext *avctx){ +static av_cold int png_enc_init(AVCodecContext *avctx){ PNGEncContext *s = avctx->priv_data; - avcodec_get_frame_defaults((AVFrame*)&s->picture); - avctx->coded_frame= (AVFrame*)&s->picture; - dsputil_init(&s->dsp, avctx); + avcodec_get_frame_defaults(&s->picture); + avctx->coded_frame= &s->picture; + ff_dsputil_init(&s->dsp, avctx); s->filter_type = av_clip(avctx->prediction_method, PNG_FILTER_VALUE_NONE, PNG_FILTER_VALUE_MIXED); if(avctx->pix_fmt == PIX_FMT_MONOBLACK) @@ -436,13 +453,16 @@ static int png_enc_init(AVCodecContext *avctx){ return 0; } -AVCodec png_encoder = { - "png", - CODEC_TYPE_VIDEO, - CODEC_ID_PNG, - sizeof(PNGEncContext), - png_enc_init, - encode_frame, - NULL, //encode_end, - .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_PAL8, PIX_FMT_GRAY8, PIX_FMT_MONOBLACK, -1}, +AVCodec ff_png_encoder = { + .name = "png", + .type = AVMEDIA_TYPE_VIDEO, + .id = CODEC_ID_PNG, + .priv_data_size = sizeof(PNGEncContext), + .init = png_enc_init, + .encode2 = encode_frame, + .pix_fmts = (const enum PixelFormat[]){ + PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_PAL8, PIX_FMT_GRAY8, + PIX_FMT_MONOBLACK, PIX_FMT_NONE + }, + .long_name = NULL_IF_CONFIG_SMALL("PNG (Portable Network Graphics) image"), };