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177 lines
5 KiB
C
177 lines
5 KiB
C
/* Gnome-Streamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <string.h>
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//#define DEBUG_ENABLED
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#include "gstriff.h"
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#define GST_RIFF_ENCODER_BUF_SIZE 1024
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#define ADD_CHUNK(riffenc, chunkid, chunksize) \
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{ \
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gst_riff_chunk *chunk;\
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chunk = (gst_riff_chunk *)(riffenc->dataleft + riffenc->nextlikely);\
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chunk->id = chunkid; \
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chunk->size = chunksize; \
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riffenc->nextlikely += sizeof(gst_riff_chunk); \
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}
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#define ADD_LIST(riffenc, listsize, listtype) \
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{ \
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gst_riff_list *list;\
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list = (gst_riff_list *)(riffenc->dataleft + riffenc->nextlikely); \
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list->id = GST_RIFF_TAG_LIST; \
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list->size = listsize; \
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list->type = listtype; \
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riffenc->nextlikely += sizeof(gst_riff_list); \
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}
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GstRiff *gst_riff_encoder_new(guint32 type) {
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GstRiff *riff;
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gst_riff_list *list;
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GST_DEBUG (0,"gst_riff_encoder: making %4.4s encoder\n", (char *)&type);
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riff = (GstRiff *)g_malloc(sizeof(GstRiff));
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g_return_val_if_fail(riff != NULL, NULL);
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riff->form = 0;
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riff->chunks = NULL;
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riff->state = GST_RIFF_STATE_INITIAL;
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riff->curoffset = 0;
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riff->incomplete_chunk = NULL;
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riff->dataleft = g_malloc(GST_RIFF_ENCODER_BUF_SIZE);
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riff->dataleft_size = GST_RIFF_ENCODER_BUF_SIZE;
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riff->nextlikely = 0;
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list = (gst_riff_list *)riff->dataleft;
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list->id = GST_RIFF_TAG_RIFF;
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list->size = 0x00FFFFFF;
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list->type = GST_RIFF_RIFF_AVI;
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riff->nextlikely += sizeof(gst_riff_list);
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return riff;
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}
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gint gst_riff_encoder_avih(GstRiff *riff, gst_riff_avih *head, gulong size) {
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gst_riff_chunk *chunk;
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g_return_val_if_fail(riff->state == GST_RIFF_STATE_INITIAL, GST_RIFF_EINVAL);
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GST_DEBUG (0,"gst_riff_encoder: add avih\n");
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ADD_LIST(riff, 0xB8, GST_RIFF_LIST_hdrl);
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ADD_CHUNK(riff, GST_RIFF_TAG_avih, size);
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chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely);
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memcpy(chunk, head, size);
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riff->nextlikely += size;
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riff->state = GST_RIFF_STATE_HASAVIH;
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return GST_RIFF_OK;
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}
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gint gst_riff_encoder_strh(GstRiff *riff, guint32 fcc_type, gst_riff_strh *head, gulong size) {
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gst_riff_chunk *chunk;
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g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASAVIH ||
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riff->state == GST_RIFF_STATE_HASSTRF, GST_RIFF_EINVAL);
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GST_DEBUG (0,"gst_riff_encoder: add strh type %08x (%4.4s)\n", fcc_type, (char *)&fcc_type);
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ADD_LIST(riff, 108, GST_RIFF_LIST_strl);
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ADD_CHUNK(riff, GST_RIFF_TAG_strh, size);
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chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely);
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head->type = fcc_type;
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memcpy(chunk, head, size);
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riff->nextlikely += size;
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riff->state = GST_RIFF_STATE_HASSTRH;
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return GST_RIFF_OK;
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}
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gint gst_riff_encoder_strf(GstRiff *riff, void *format, gulong size) {
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gst_riff_chunk *chunk;
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g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASSTRH, GST_RIFF_EINVAL);
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GST_DEBUG (0,"gst_riff_encoder: add strf\n");
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ADD_CHUNK(riff, GST_RIFF_TAG_strf, size);
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chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely);
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memcpy(chunk, format, size);
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riff->nextlikely += size;
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riff->state = GST_RIFF_STATE_HASSTRF;
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return GST_RIFF_OK;
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}
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gint gst_riff_encoder_chunk(GstRiff *riff, guint32 chunk_type, void *chunkdata, gulong size) {
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gst_riff_chunk *chunk;
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g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASSTRF ||
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riff->state == GST_RIFF_STATE_MOVI, GST_RIFF_EINVAL);
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if (riff->state != GST_RIFF_STATE_MOVI) {
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ADD_LIST(riff, 0x00FFFFFF, GST_RIFF_LIST_movi);
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riff->state = GST_RIFF_STATE_MOVI;
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}
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GST_DEBUG (0,"gst_riff_encoder: add chunk type %08x (%4.4s)\n", chunk_type, (char *)&chunk_type);
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ADD_CHUNK(riff, chunk_type, size);
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if (chunkdata != NULL) {
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chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely);
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memcpy(chunk, chunkdata, size);
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riff->nextlikely += size + (size&1);
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}
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return GST_RIFF_OK;
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}
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GstBuffer *gst_riff_encoder_get_buffer(GstRiff *riff) {
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GstBuffer *newbuf;
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newbuf = gst_buffer_new();
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GST_BUFFER_DATA(newbuf) = riff->dataleft;
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GST_BUFFER_SIZE(newbuf) = riff->nextlikely;
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return newbuf;
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}
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GstBuffer *gst_riff_encoder_get_and_reset_buffer(GstRiff *riff) {
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GstBuffer *newbuf;
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newbuf = gst_riff_encoder_get_buffer(riff);
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riff->dataleft = g_malloc(GST_RIFF_ENCODER_BUF_SIZE);
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riff->dataleft_size = GST_RIFF_ENCODER_BUF_SIZE;
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riff->nextlikely = 0;
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return newbuf;
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}
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