+++ /dev/null
-/*
- * JPEG image format
- * Copyright (c) 2003 Fabrice Bellard.
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include "avformat.h"
-
-static int jpeg_probe(AVProbeData *pd)
-{
- if (pd->buf_size >= 64 &&
- pd->buf[0] == 0xff && pd->buf[1] == 0xd8 && pd->buf[2] == 0xff)
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-typedef struct JpegOpaque {
- int (*alloc_cb)(void *opaque, AVImageInfo *info);
- void *opaque;
- int ret_code;
-} JpegOpaque;
-
-/* called by the codec to allocate the image */
-static int jpeg_get_buffer(AVCodecContext *c, AVFrame *picture)
-{
- JpegOpaque *jctx = c->opaque;
- AVImageInfo info1, *info = &info1;
- int ret, i;
-
- info->width = c->width;
- info->height = c->height;
- switch(c->pix_fmt) {
- case PIX_FMT_YUV420P:
- info->pix_fmt = PIX_FMT_YUVJ420P;
- break;
- case PIX_FMT_YUV422P:
- info->pix_fmt = PIX_FMT_YUVJ422P;
- break;
- case PIX_FMT_YUV444P:
- info->pix_fmt = PIX_FMT_YUVJ444P;
- break;
- default:
- return -1;
- }
- ret = jctx->alloc_cb(jctx->opaque, info);
- if (ret) {
- jctx->ret_code = ret;
- return -1;
- } else {
- for(i=0;i<3;i++) {
- picture->data[i] = info->pict.data[i];
- picture->linesize[i] = info->pict.linesize[i];
- }
- return 0;
- }
-}
-
-static void img_copy(uint8_t *dst, int dst_wrap,
- uint8_t *src, int src_wrap,
- int width, int height)
-{
- for(;height > 0; height--) {
- memcpy(dst, src, width);
- dst += dst_wrap;
- src += src_wrap;
- }
-}
-
-/* XXX: libavcodec is broken for truncated jpegs! */
-#define IO_BUF_SIZE (1024*1024)
-
-static int jpeg_read(ByteIOContext *f,
- int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque)
-{
- AVCodecContext *c;
- AVFrame *picture, picture1;
- int len, size, got_picture, i;
- uint8_t *inbuf_ptr, inbuf[IO_BUF_SIZE];
- JpegOpaque jctx;
-
- jctx.alloc_cb = alloc_cb;
- jctx.opaque = opaque;
- jctx.ret_code = -1; /* default return code is error */
-
- c = avcodec_alloc_context();
- if (!c)
- return -1;
- picture= avcodec_alloc_frame();
- if (!picture) {
- av_free(c);
- return -1;
- }
- c->opaque = &jctx;
- c->get_buffer = jpeg_get_buffer;
- c->flags |= CODEC_FLAG_TRUNCATED; /* we dont send complete frames */
- if (avcodec_open(c, &mjpeg_decoder) < 0)
- goto fail1;
- for(;;) {
- size = get_buffer(f, inbuf, sizeof(inbuf));
- if (size == 0)
- break;
- inbuf_ptr = inbuf;
- while (size > 0) {
- len = avcodec_decode_video(c, &picture1, &got_picture,
- inbuf_ptr, size);
- if (len < 0)
- goto fail;
- if (got_picture)
- goto the_end;
- size -= len;
- inbuf_ptr += len;
- }
- }
- the_end:
- /* XXX: currently, the mjpeg decoder does not use AVFrame, so we
- must do it by hand */
- if (jpeg_get_buffer(c, picture) < 0)
- goto fail;
- for(i=0;i<3;i++) {
- int w, h;
- w = c->width;
- h = c->height;
- if (i >= 1) {
- switch(c->pix_fmt) {
- default:
- case PIX_FMT_YUV420P:
- w = (w + 1) >> 1;
- h = (h + 1) >> 1;
- break;
- case PIX_FMT_YUV422P:
- w = (w + 1) >> 1;
- break;
- case PIX_FMT_YUV444P:
- break;
- }
- }
- img_copy(picture->data[i], picture->linesize[i],
- picture1.data[i], picture1.linesize[i],
- w, h);
- }
- jctx.ret_code = 0;
- fail:
- avcodec_close(c);
- fail1:
- av_free(picture);
- av_free(c);
- return jctx.ret_code;
-}
-
-#ifdef CONFIG_ENCODERS
-static int jpeg_write(ByteIOContext *pb, AVImageInfo *info)
-{
- AVCodecContext *c;
- uint8_t *outbuf = NULL;
- int outbuf_size, ret, size, i;
- AVFrame *picture;
-
- ret = -1;
- c = avcodec_alloc_context();
- if (!c)
- return -1;
- picture = avcodec_alloc_frame();
- if (!picture)
- goto fail2;
- c->width = info->width;
- c->height = info->height;
- /* XXX: currently move that to the codec ? */
- switch(info->pix_fmt) {
- case PIX_FMT_YUVJ420P:
- c->pix_fmt = PIX_FMT_YUV420P;
- break;
- case PIX_FMT_YUVJ422P:
- c->pix_fmt = PIX_FMT_YUV422P;
- break;
- case PIX_FMT_YUVJ444P:
- c->pix_fmt = PIX_FMT_YUV444P;
- break;
- default:
- goto fail1;
- }
- for(i=0;i<3;i++) {
- picture->data[i] = info->pict.data[i];
- picture->linesize[i] = info->pict.linesize[i];
- }
- /* set the quality */
- picture->quality = 3; /* XXX: a parameter should be used */
- c->flags |= CODEC_FLAG_QSCALE;
-
- if (avcodec_open(c, &mjpeg_encoder) < 0)
- goto fail1;
-
- /* XXX: needs to sort out that size problem */
- outbuf_size = 1000000;
- outbuf = av_malloc(outbuf_size);
-
- size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
- if (size < 0)
- goto fail;
- put_buffer(pb, outbuf, size);
- put_flush_packet(pb);
- ret = 0;
-
- fail:
- avcodec_close(c);
- av_free(outbuf);
- fail1:
- av_free(picture);
- fail2:
- av_free(c);
- return ret;
-}
-#endif //CONFIG_ENCODERS
-
-AVImageFormat jpeg_image_format = {
- "jpeg",
- "jpg,jpeg",
- jpeg_probe,
- jpeg_read,
- (1 << PIX_FMT_YUVJ420P) | (1 << PIX_FMT_YUVJ422P) | (1 << PIX_FMT_YUVJ444P),
-#ifdef CONFIG_ENCODERS
- jpeg_write,
-#else
- NULL,
-#endif //CONFIG_ENCODERS
-};
projects / synfig.git / blobdiff